Strength Of material testing instruments

Features :
Loading accuracy as high as ± 1% Straining at variable speeds to suit a wide range of materials Motor driven threaded columns for quick effortless adjustment of lower cross-head to facilitate rapid fixing of test specimen Continuous roll autographic recorder supplied as standard to enable study of the behaviour of materials High reading accuracy due to large size and design of dial Large effective clearance between columns enables testing of standard specimens as well as structures Easy change from plain to threaded and screwed specimens Robust staining frame of an extremely rigid construction Fully enclosed and protected pendulum Simple controls for ease of operation operation ensured by means of safety devices Wide range of standard and optional accessories, including load stabilizer Chrome Plated Metal Components Plain & threaded columns. are hard chrome-plated to give the machine a perpetual new look.

Application :
Universal Testing Machine is designed for testing metals and other materials under tension, compression, bending, transverse and shear loads. Hardness test on metals can also be conducted. The available capacity is 10 ton to 500 ton.

Principle of Operation :
Operation of the machine is by hydraulic transmission of load from the test specimen to a separately housed load indicator. The hydraulic system is ideal since it replaces transmission of load through levers and knife-edges, which are prone to wear out and damage due to shock on rupture of test pieces. Load is applied by a hydrostatically lubricated ram. Main cylinder pressure is transmitted to the cylinder of the pendulum dynamometer system housed in the control panel. The cylinder of the dynamometer is also of self-lubricating design. The load transmitted to the cylinder of the dynamometer is transferred through a lever system to a pendulum. Displacement of the pendulum actuates the rack and pinion mechanism which operates the load indicator pointer and the autographic recorder. The deflection of the pendulum represents the absolute load applied on the test specimen. Return movement of the pendulum is effectively damped to absorb energy in the event of sudden breakage of specimen.

The Machine consists of :

• STRAINING UNIT
• CONTROL PANEL
• POWER PACK
• HYDRAULIC CONTROLS
• LOAD INDICATOR SYSTEM
• PENDULUM DYNAMOMETER

STANDARD ACCESSORIES (COMMON FOR ALL UNIVERSAL TESTING MACHINES) FOR TENSION TEST :

• Clamping Jaws for Testing Round Specimens under Tension
• Clamping Jaws for Testing Flat Specimens under Tension

FOR COMPRESSION TEST :

• Pair of Platens Duly Hardened, Ground and Polished with Bottom
• Platen provided with Guide Lies for Conducting Compression Tests

FOR BENDING / TRANSVERSE TEST :
Table with Adjustable Rollers complete with Mandrel for conducting Bending / Transverse Tests

OPTIONAL ACCESSORIES FOR UNIVERSAL TESTING MACHINES

• The Universal Testing Machine is made more versatile and utility oriented for carrying out a number of other tests as well with Accessories/Attachments that are Optional. These Optional Accessories/ Attachments are priced nominally and are quite indispensable especially for Technical Institutions.
• Load Stabilizer
• Brinell Hardness Test Attachment
• Double Shear Test Attachment : Small & Large
• 180º Bend Test Attachment
• Bare Attachment
• Bushes for Testing Threaded Specimens
• Bushes for Testing Collared Specimens
• Attachment for Testing Wire & Manila Ropes
• Extensometers : Mechanical/Electronic with Fixed & Variable
• Gauge Length
• Flexure Testing Attachment

Floor mounted, vertical type, two column construction specially manufactured for various applications. tensile testing machines are designed for determining the Tensile Strength and Elongation of a host of materials like ferrous and non ferrous materials, cables & conductors, Plastic, PVC, Rubber specimens, paper, plywood etc. Our tensile testing machines are also capable for conducting compression, Cross breaking and Shear tests thus making them more versatile with a few additional attachments. tensile testing machines are available in various capacities depending upon the requirements right from 5 kgf to 10 Tonnes ensuring ± 1% accuracy in test results.

It is designed for conducting Torsion and Twist Tests on various metal wires, tubes sheet materials. Torque measurement is by Pendulum dynamometer System. Torque ranges can be adjusted. Torque is applied to specimen by geared motor through gear box. Autographic recorder can be provided to know the relation between torque and angle of twist on specific request. The Accuracy of the torque indication is ± 1% of the true torque. The complete system is hydraulicly damped for vibration free Loading.

It is used for testing springs under Tension & Compression Loads. Different Capacities from 100 Kg upto 100 Ton are manufactured. Different Models Like Manually Operated, Electrically Operated, Electronic (Digital) & Computerized Models are manufactured as per clients requirement.

This is used for conducting1Z0D, CHARPY and IMPACT TENSION tests. The difference between the height of the drop before rupture and height of the rise after rupture shows the impact energy absorbed by the specimen and is reflected on the dial scale.

Rockwell hardness testers & Rockwell Cum Brinell hardness testers that are used for measuring hardness of all kinds of alloys and metals, whether hard or soft, round or flat or irregular in shapes. These machines are as per IS:1586- 2000 standards and are also available in motorized versions. Such products find their applications in tool rooms, laboratories, Heat treatment shops, inspection departments, research & development departments, educational institutions and foundries.

Following are some of the specifications of this range of machines :

• Automatic weight selection with automatic zero setting dial gauge
• Test height x Throat is - 215 x 132 mm
• Rockwell test minor load is 10 KGF & major loads are 60,100,150 KGF
• Extra test height & throat of 295 x 148 mm
• Rockwell hardness scales such as HRB, HRA,HRC, etc. is obtained by using different types of indentors ( Diamond / Ball )

We provide Rotating Cantilever Fatigue Testing Machines, which are used to ascertain the fatigue strength under reversed bending stresses. The machine helps to check the fatigue life & location of fatigue failure of metal specimens, subjected to alternating stress cycles. Our range of Fatigue Testing Machines is well-known for its features like reliability, durability and effective performances. We ensure that our machines support as a cantilever, where dead weights at the free ends through self aligned bearings allow vertical loading and rotation of the specimen. Furthermore, we use a counter balancing lever system to balance the dead weight of the loading assembly. There is an induction motor to rotate the specimen and a cut off switch is used to stop the machine when it fails. A counter which is attached to the extension of the motor shaft through reduction gear, records the total counts of cycles to failure.

TECHNICAL SPECIFICATIONS :

• Capacity: 300 inch lbs
• Specimen: ½" dia x 5 " long
• Motor: 0.5 H.P, 3 Phase A.C.
• Speed: 2850 rpm
• Counter: Provided with Extended Motor Shaft
• Dimensions: Approx. Length 55", Width 25 "
• Approx Wt: 1000 lbs

This is used for erichsen cupping tests on metals. These machines works faster as they are manually operated and quick clamps help in their smooth working. Other technical specifications are :

• Width of sample: 70-90 mm
• Thickness of sample: 0.1-2 mm
• Least count: 0.01 mm
• Overall Dimensions ( approx): 450x500x500 mm
• Net weight (approx): 20 kg

Our Torsion Testing Machine for Wires & Cables promptly determines the number of twists required to fracture a wire sample. The machine is available in two models, one for testing wires in the range of 1-5mm and the other for 4-10mm length. The machine generates an output of 30, 60 or 90 rpm with the help of gear box connected with a motor. The revolution counter shows the number of twists and stops when the sample fails. The wire is held between a rotating and a non-rotating chuck whose distance lounge between 1-500mm in length. Operated on 400/440 volts, 3 phase A.C supply, this machine can test wires ranging from 1-10 mm in length.

Ball Compression Testing Machine (Hydraulic), which is widely used for the testing of stainless steel ball upto 10 mm Diameter and can also be used for concrete mould & concrete cylinder with an attachment. Being easy to operate, our compression testing machine provides accurate results. This is electrically operated having capacity of 5 ton. Higher capacity of ball compression machine is also available