Quick answer. Sort every rig by regime before you order: elastic, plastic or time-dependent. The SOM items fall into three groups. Elastic rigs, such as beam deflection, torsion, springs, wires and strain gauges, give a straight-line graph in one session, so buy several and let a class rotate. Destructive machines, such as the plastic torsion tester, universal testing machine, Izod impact and buckling tester, consume a specimen each run, so one usually serves for demonstrations. Fatigue and creep tests run for hours or days and belong in project work, so buy them only if your syllabus examines them.
About forty items, coded SOM-0001 onwards - the experiment set of a strength of materials laboratory. Beams: deflection of beams, an advanced beam testing apparatus, deflection of curved bars, curved beams and test beams. Torsion: torsion of bars, torsion of a spiral spring, and separate elastic and plastic torsion testers. Stability: critical load on struts, critical condition of struts and a buckling tester. Springs and wires: extension and compression of springs, extension of wires, compound wires and an internal elastic forces apparatus. Combined and pressurised: combined bending and torsion, a thick cylinder apparatus and a diaphragm. Strain measurement: electrical resistance strain gauges, their calibration and strain gauge studies. Time-dependent failure: creep and fatigue, including a rotating fatigue machine. Machines: a universal testing machine, a fatigue testing machine and an Izod impact testing machine. Structures - trusses, an arched bridge and a suspension bridge - also appear here.
Three notes on our catalogue text. One record is listed as "Hook Low", which is the Hooke's Law apparatus - the term you are probably searching for, and one of several places in this catalogue where a possessive apostrophe has been stripped by an import. Several records carry one-word names - creep, strain, bending, diaphragm, truss - which identify a property rather than a product, so ask us what each is. And two records in this listing, a lastometer and a leak proofness tester, are leather testing instruments that have been copied in from the leather testing equipment range; they are not strength of materials apparatus. Quote the code and the full product name together and have both confirmed on the proforma invoice.
Strength of materials is three subjects wearing one name, and the apparatus divides the same way. Knowing which of the three a given rig belongs to tells you what result it can produce and how long it will take - and it is the quickest way to match this listing to a syllabus.
| Regime | What is measured | Apparatus here | Practical length |
|---|---|---|---|
| Elastic | Recoverable deformation, and the constants that govern it - Young modulus, modulus of rigidity, Poisson ratio. This is where theory and experiment agree closely, which is exactly why it is taught first | Beam deflection, curved bars, torsion of bars and springs, extension of wires and springs, elastic torsion tester, thick cylinder, strain gauges | Short. Several readings and a straight-line graph in one session |
| Plastic and ultimate | Permanent deformation, yield, and failure. The specimen is destroyed | Plastic torsion tester, universal testing machine, Izod impact, buckling tester | Short per specimen, but each run costs a specimen |
| Time-dependent | Failure under repeated or sustained load, which is how real components actually fail | Fatigue testing machine, rotating fatigue machine, creep apparatus | Hours to days. These cannot be run inside a practical slot and need a counter, an auto-stop and a log |
The practical consequence for a purchase: a department can run the elastic experiments every week with a class, the destructive ones as demonstrations with a few specimens, and the time-dependent ones as project work. Buy accordingly - several elastic rigs so a class can rotate, one destructive machine, and one fatigue or creep machine if the syllabus examines them at all.
A beam deflection apparatus looks like the simplest rig in the laboratory, and it has one failure mode that quietly ruins results. The deflections being measured are small - often fractions of a millimetre - and if the frame, the supports or the dial gauge mounting deflect by a comparable amount, the experiment measures the apparatus rather than the beam.
So ask: how stiff and how heavy is the frame, and must it be bolted down; how are the supports made - knife edges and rollers that genuinely allow rotation and longitudinal movement, or clamped blocks that introduce an unintended fixed end; how is the dial gauge mounted, and is its mount independent of the loaded span; and what resolution the gauge offers against the deflections expected. Ask also what beams are supplied - the exercise is far better with several materials and sections of known dimensions, since the second moment of area is calculated from measured dimensions and a nominal section is not good enough.
Buckling is not a strength problem but a stability problem, and that is the lesson: a slender strut fails at a load far below the material strength, and the failure depends on the end conditions rather than only on the material. The critical load apparatus and the buckling tester exist to show it, and the end fixings - pinned, fixed, one of each - are the experiment, so ask what end conditions can be set and how repeatably.
And the safety point, because this is the one rig in the listing that surprises people: buckling is sudden, and a strut released at the critical load can fly out of the apparatus. Ask about a guard or a shield, a retaining arrangement at the ends, and where the operator stands. It is a trivial addition and it should be specified rather than improvised.
The strain gauge items are the most valuable in this listing for a student heading into industry, because a bonded resistance gauge is how real structures are measured. They also demand more care than anything else here, and the questions reflect that.
A gauge measures strain at a point on a surface it is bonded to, through a bridge circuit that resolves changes of a few parts per million in resistance. The consequences: the bond is the measurement - a gauge imperfectly bonded reads low and drifts, and bonding is a skill that takes practice, so ask what adhesive, surface preparation materials and practice coupons are supplied and what they cost, because they are consumables; lead resistance and temperature both shift the reading, so ask how the bridge is configured, whether three-wire connection and a dummy gauge for temperature compensation are provided, and whether the indicator has a zero and a calibration facility. The calibration apparatus in this listing exists precisely to let a student verify a gauge factor rather than take it on trust, which is why it is worth having alongside the gauges.
Fatigue and creep run long. A rotating fatigue test to failure can take hours and a creep test days, so the question is not what the machine measures but whether it can be left: ask for a cycle counter, an automatic stop at specimen failure, a guard that contains the broken specimen, and a logging arrangement for creep, since a creep curve read by hand over three days will have gaps in it. Ask also what specimen sizes and materials are used and what they cost, because these are the most specimen-hungry experiments in the laboratory.
The thick cylinder apparatus is a pressure vessel in miniature. It demonstrates the radial and hoop stress distribution that a thin-cylinder analysis cannot give, and it holds real pressure to do so. Ask the maximum working pressure, what relief device is fitted and where it discharges, how the pressure is generated and read, and what shielding surrounds the cylinder. As with every pressurised rig, ask whether the vessel carries a certificate and what your own authority requires.
Three records here are testing machines rather than teaching rigs: a universal testing machine, a fatigue testing machine and an Izod impact machine. They are the right instruments for this laboratory, and they are specified in much more detail - capacity, accuracy class, verification certificate, fixtures, notch preparation, low-temperature impact - in our universal testing machines and tensile testing machines listings. If you are buying a machine rather than an experiment, read those pages and quote from them; if you are buying the teaching set, the experiments on this page are the ones that produce a graph a student can plot against theory.
Structures apparatus - trusses, arches, suspension bridges and frames - also appears both here and in the machines listing, where the demountable-or-fixed question is set out. And for the dynamics side of mechanics, see models for theory of machines.
For each rig: the experiment and the quantities measured, with the resolution of each instrument against the magnitudes expected; frame stiffness, mass and whether bolting down is required; support and end-fixing arrangements; specimens supplied - material, dimensions and quantity - and the price of further sets; dial gauges, indicators and whether mountings are independent of the loaded member; for strain gauge work, adhesive, preparation materials, practice coupons, bridge configuration and temperature compensation; for fatigue and creep, cycle counter, auto-stop, guarding and logging; for the thick cylinder, working pressure, relief, shielding and any certificate; guarding on anything that fails suddenly; bench or floor mounting and footprint; the worksheets supplied; nominal voltage, frequency and plug pattern; consumables and spares with prices; and the warranty, commissioning and local service position. For any certification stated here, contact us for the latest copies of the relevant certificates before you tender on it.
The full set is listed under mechanical lab equipments. For a quotation, send us your syllabus experiment list and tell us the destination country, the class size in one practical session and whether fatigue or creep is examined - that last answer changes the shape of the order.
Buy by regime. The elastic experiments measure recoverable deformation and the constants behind it, Young modulus, modulus of rigidity and Poisson ratio, where theory and experiment agree closely, so a department can run them every week; several rigs let a class rotate. The destructive ones are short per specimen but cost a specimen each run, so one machine used for demonstrations is usually enough. Fatigue and creep cannot be run inside a practical slot. When you ask for a quotation, tell us your class size and whether fatigue or creep is examined, because that answer changes the shape of the order.
A stiff frame. The deflections measured are small, often fractions of a millimetre, and if the frame, supports or dial gauge mounting deflect by a comparable amount, the experiment measures the apparatus rather than the beam. Ask how stiff and heavy the frame is and whether it must be bolted down; whether the supports are knife edges and rollers that genuinely allow rotation and longitudinal movement, or clamped blocks that create an unintended fixed end; and whether the gauge mount is independent of the loaded span. Ask also for beams in several materials and sections, measured rather than nominal.
With a guard, yes. Buckling is a stability problem rather than a strength problem: a slender strut fails at a load far below the material strength, and the failure depends on the end conditions, pinned, fixed or one of each, which are the experiment. Ask what end conditions the critical load apparatus and buckling tester can set and how repeatably. Then the safety point that surprises people: buckling is sudden, and a strut released at the critical load can fly out of the apparatus. Ask about a guard or shield, a retaining arrangement at the ends and where the operator stands, and specify it rather than improvise.
More than the instrument. A bonded resistance gauge measures strain at one point through a bridge circuit that resolves changes of a few parts per million in resistance, so the bond is the measurement: an imperfectly bonded gauge reads low and drifts, and bonding takes practice. Ask what adhesive, surface preparation materials and practice coupons are supplied, since they are consumables. Lead resistance and temperature both shift the reading, so ask about three-wire connection, a dummy gauge for temperature compensation, and a zero and calibration facility. The strain gauge calibration apparatus lets students verify a gauge factor rather than trust it.
They have to be, so ask whether they can be. A rotating fatigue test to failure can take hours and a creep test days, so the question is less what the machine measures than whether it can run unattended. Ask for a cycle counter, an automatic stop at specimen failure, a guard that contains the broken specimen, and a logging arrangement for creep, since a creep curve read by hand over three days will have gaps. Ask also what specimen sizes and materials are used and how further specimens are supplied, because these are the most specimen-hungry experiments in the laboratory.
Because of catalogue import faults. One record is listed as Hook Low, which is the Hooke's Law apparatus. Several records carry one-word names, such as creep, strain, bending, diaphragm and truss, which identify a property rather than a product, so ask what each one is. A lastometer and a leak proofness tester are leather testing instruments copied in from that range. The universal testing, fatigue testing and Izod impact machines are specified in more detail in the universal and tensile testing machine listings, and structures apparatus also appears in the machines listing. Quote the code with the full name.
Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.
Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.
Specifications for the SOM items, including instrument resolution, frame stiffness, end fixings, specimens supplied and, for the thick cylinder, working pressure and relief, are confirmed in writing on the quotation and the proforma invoice. For pressure vessel or machine verification documents, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing note: the Hooke's Law apparatus is listed as Hook Low; several records carry one-word names such as creep, strain, bending, diaphragm and truss that identify a property rather than a product; and a lastometer and a leak proofness tester are leather testing instruments copied into this range.
General testing machine is an instrument that is utilized to test the elasticity and compressive quality of materials. It is broadly utilized as a part of research centers and ventures for experimentation and testing individually. Every one of our machines are finished in themselves are sufficiently productive to bear on each test with exactness.
Weakness testing machines are utilized to proffer genuine weights on different segments and materials to test their versatility, quality and stress bearing limits. As such, Fatigue testing is a dynamic testing mode which carry on as how a segment will perform/flop under genuine pressure conditions. They can coordinate malleable, compressive, bowing and torsion focuses and are generally regulated to springs, suspension segments and biomedical inserts.
1. In Izod Impact Testing Machine, a solitary point test is directed which evaluates a material's protection from affect from an influencing pendulum.
2. Izod effect can be called as dynamic vitality expected to start crack and proceed with the break until the point when the example gets broke.
3. Izod examples are scored to anticipate contortion of the endless supply of the pendulum.
4. This test can be utilized as a speedy and simple quality control check to oversee if a material meets positive effect properties or to investigate materials for general sturdiness.
Highlights Rigid base and backings Choice of end conditions a) cut edge b) worked in Beams or cantilevers Deflection and incline quantifiable Three year warrantyRange of Experiments Verification of bar diversion equation Deflection and slant of shafts and cantilevers Verification of both region - minute theoremsDescription The seat mounted contraption has a substantial steel base with a settled help toward one side and a moveable help at the other. The backings can be fitted with cut edges or cinch plates one of which licenses level development for an encastre shaft. A steel shaft and two load holders are provided together with two dial checks for estimating bar avoidances and inclines. This hardware is a piece of a range intended to both exhibit and tentatively affirm fundamental designing standards. Awesome care has been given to every thing to give wide exploratory degree without unduly confounding or trading off the outline. Each bit of mechanical assembly is independent and reduced. Setting up time is insignificant, and all estimations are made with the least difficult conceivable instrumentation, so the understudy contribution is absolutely with the designing standards being educated. An entire guideline manual is given depicting the mechanical assembly, its application, trial technique and commonplace test outcomes.
Savvy Teaching Comprehensive hypothesis of shafts Simple and propped cantilevers Simply upheld, settled and persistent bars Three wharfs measure positive and negative responses Piers incorporate a re-leveling framework Three dial checks on stands Point stacks and conveyed stacking Six test bars to confirm all factors Two discretionary additional arrangements of chose pillars Data logging choice Three year guarantee Range of Experiments All factors in diversion of bars Slope and ebb and flow of bars Support responses of single traverse and consistent bars Effect of sinking bolsters Area minute hypotheses Super-position Clerk Maxwell s proportional theorum Flitched bars Non-uniform bars Description The device gave permits a boundless scope of bar examinations to be performed to quantify bolster responses and the avoidances and pivots of just upheld, settled and two traverse nonstop bars. The end cinch likewise offers chip away at basic and propped cantilevers. Likewise the impact of sinking underpins on a consistent shaft can be contemplated. The trials are collected on a seat mounted twin bar construct remaining in light of end outlines with leveling feet. Three load estimating wharfs with an advanced read out in decaNewtons can be clipped to the base anyplace inside its length of 1.2 m. These docks are furnished with a tallness redress framework to adjust for the vertical diversion of the heap marker and are fitted with shaft connectors which give stuck conditions to both descending and upward bar responses. A fourth wharf is a basic clip for supporting a cantilever or the settled end of a pillar. Three dial checks on stands can be braced anyplace on the base. Four load holders accommodate point loads, while an arrangement of opened weights can be utilized to reenact a disseminated stack on a pillar. The arrangement of test pillars bears the investigation of the considerable number of factors in the standard recipe for uniform shafts. This hardware is a piece of a range intended to both show and tentatively affirm essential building standards. Awesome care has been given to every thing in order to give wide trial scope without unduly entangling or trading off the plan. Each bit of contraption is independent and conservative. Setting up time is negligible, and all estimations are made with the least difficult conceivable instrumentation, so the understudy association is absolutely with the designing standards being educated. An entire guideline manual is given depicting the device, its application, trial strategy and run of the mill test comes about..
Highlights Low savvy showing Self-contained Bench-mounted Direct use of torque and estimation of edge of curve Determination of modulus of unbending nature for various materials 3 year warrantyRange of Experiments To gauge the edge of turn created by torsional loads for different examples and confirm that the relationship is straight. To decide the modulus of unbending nature for examples of different materialsDescription Torsional loads are basic in control transmission shafts, and in specific cases can likewise happen in basic individuals. It is in this way vital that architects comprehend the connection between the torsional stack connected to a specific pillar and the precise contort delivered. Additionally, engineers must see how this relationship fluctuates with the material from which the shaft is made and its cross sectional polar snapshot of zone. This device enables these connections to be explored straightforwardly. Examples are inflexibly held in a clip settled to one end of the base casing of the mechanical assembly. A short shaft mounted in the bearing has a three jaw throw confronting the brace and a torsion head at the outward side. The torsion head and toss are utilized to apply torsional burdens to the example. A turn scale and pointer can be appended to any point on the specimen's length to discover the edge of bit of the example. Four examples are given as standard, to be specific : Mild steel pole 460 x 5mm dia. Metal bar 460 x 5 mm dia. Aluminum combination bar 460 x 4.76mm dia. Nylon bar 460 x 6.35mm dia. This hardware is a piece of a range intended to both show and tentatively affirm essential building standards. Awesome care has been given to every thing to give wide trial scope without unduly confusing or trading off the outline. Each bit of device is independent and reduced. Setting up time is insignificant, and all estimations are made with the most straightforward conceivable instrumentation, so the understudy contribution is simply with the designing standards being instructed. A total direction manual is given depicting the mechanical assembly, its application, test technique and run of the mill test comes about.
Highlights Low cost, powerful showing Self-contained Bench-mounted Combined twisting and strain Three whimsies Three year warrantyRange of Experiments To quantify the vertical bowing redirection of the bar and to contrast and hypothetical expectations. To evaluate the impact of whimsy of loading.Description Sometimes in the plan of a structure, a strain part must be balanced from the line of activity of the power. The part at that point needs to convey consolidated pressure and bowing burdens, the last expanding with the erraticism of the heap. The flightiness is overstated to make visual valuation for the marvel conceivable. At the point when the heap line is outside the center third of a square tie bar, as in this analysis, the twisting minute prevails and the bowing avoidance might be significant. The device empowers both the heap and unconventionality to be changed. A 9mm square area by 800mm long example is given, together with dial measure and load holder. Distinctive molded examples can be fabricated in the school workshop as required. This hardware is a piece of a range intended to both show and tentatively affirm essential designing standards. Awesome care has been given to every thing in order to give wide test scope without unduly entangling or trading off the outline. Each bit of mechanical assembly is independent and smaller. Setting up time is insignificant, and all estimations are made with the least complex conceivable instrumentation, so the understudy association is absolutely with the designing standards being educated. A total direction manual is given portraying the contraption, its application, exploratory method and common test outcomes..
Highlights Low financially savvy showing Self-contained Wall-mounted Simple assurance of Young s modulus Verification of hooke s law Range of example material and thickness accessible 3 year guarantee Range of Experiments To decide Young s modulus of flexibility for the example wire To confirm Hooke s Law Description Loaded wires frame a straightforward analysis which produces astounding and straightforward outcomes. A solitary wire can be utilized to decide Young s Modulus of Elasticity for the material, and to affirm Hooke s Law. Two sections are secured to a divider least 2m separated in a vertical line; a best section from which to hang an example wire, and a slider section used to gauge the augmentation of the wire. The slider incorporates a vernier for precise estimation. For wellbeing, the lower section ought to be sensibly near the ground. This hardware is a piece of a range intended to both exhibit and tentatively affirm fundamental designing standards. Extraordinary care has been given to every thing to give wide test scope without unduly confusing or bargaining the plan. Each bit of device is independent and minimized. Setting up time is negligible, and all estimations are made with the most straightforward conceivable instrumentation, so the understudy association is simply with the building standards being instructed. A total guideline manual is given depicting the mechanical assembly, its application, exploratory technique and common test outcomes..
Highlights Low financially savvy showing Self-contained Wall-mounted Simple assurance of Young s modulus Verification of Hooke s Law Range of example material and thickness accessible Investigation of worries in compound suspension 3 year guarantee Range of Experiments To decide Young s modulus of versatility for the example wire To check Hooke s Law To assess the equal modulus of flexibility for the consolidated wire suspension To decide the heap in the wire under states of equivalent strain in each wire. To look at test and hypothetical outcomes Description Loaded wires shape a straightforward test which produces phenomenal and straightforward outcomes. A solitary wire can be utilized to decide Young s Modulus of Elasticity for the material, and to affirm Hooke s Law. With two wires, the analysis can be broadened to research the compelling attributes of two distinct materials subjected to a typical strain. Two parallel arrangements of sections are secured to a divider minium 2m separated in a vertical line; a best section from which to hang an example wire, and a slider section used to quantify the augmentation of the wire. The slider incorporates a vernier for precise estimation. For security, the lower section ought to be sensibly near the ground. The lower finishes of each slide are associated by a connection. A heap holder can be moved along the connection until the point when strains are leveled in each wire. The wires might be of various materials, yet should be a similar length. This gear is a piece of a range intended to both show and tentatively affirm fundamental designing standards. Awesome care has been given to every thing in order to give wide test scope without unduly convoluting or bargaining the outline. Each bit of contraption is independent and conservative. Setting up time is negligible, and all estimations are made with the easiest conceivable instrumentation, so the understudy contribution is simply with the designing standards being educated. An entire direction manual is given depicting the mechanical assembly, its application, test system and common test outcomes..
includes Low financially savvy showing Self-contained Wall-mounted Demonstrates Hooke s Law Measurement of spring firmness 3 year guarantee Range of Experiments To test the connection between the heap connected and the adjustment long of a spring (Hooke s Law) To decide spring solidness For further developed courses, the reliance of spring solidness on the wire breadth, spring distance across, length, number of turns and material. Correlation with hypothetical gauge. Depiction Springs are utilized as a part of designing to store vitality or to give reestablishing powers. Both pressure and strain springs might be experienced. The diversion of a spring relies upon the heap connected to it, a perception cherished in Hooke s Law. Utilizations of springs are found in spring adjusts which show stacks by estimating spring avoidances and in auto suspensions where they retain vitality caused by wheel vertical development because of potholes and knocks. The gear is intended to be fitted to a divider. It is utilized to test strain jumps up to 200mm long. The most extreme spring width is 38mm. A weight holder is utilized to apply a heap to the spring. Spring redirection is estimated with a sliding scale which can be effortlessly re-focused to suit the length of the spring. A spring, weight holder and weights are provided with each bit of gear. This gear is a piece of a range intended to both exhibit and tentatively affirm essential building standards. Extraordinary care has been given to every thing in order to give wide test scope without unduly convoluting or trading off the plan. Each bit of contraption is independent and minimal. Setting up time is insignificant, and all estimations are made with the least complex conceivable instrumentation, so the understudy inclusion is simply with the designing standards being instructed. A total guideline manual is given portraying the mechanical assembly, its application, trial system and ordinary test outcomes..
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