Torsion Apparatus Searle's Type

Product Code : LSK-AM-11092

Torsion Apparatus Searle's Type (SKU LSK-AM-11092) is a horizontal bench apparatus for twisting a test rod with a known couple and reading the angle of twist along its length. It is the standard set-up for the static method of finding the modulus of rigidity in B.Sc. physics and engineering materials labs. Science Lab Supplies produces it in its own factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and deals directly with colleges, schools, contractors and distributors.

Specifications

Two cast iron feet, joined by two supporting rods, carry the test rod. The front foot holds a 165 mm grooved wheel running in ball bearings, whose spindle grips one end of the rod in a split collet chuck; a clamping block on the rear foot holds the other end.

Applications and Experiments for the Searle's Torsion Apparatus

Masses hung from the cord apply a twisting couple through the wheel, and the two pointers show the angle of twist at two points on the rod. From these readings students calculate the modulus of rigidity by the statical method, a regular B.Sc. and engineering physics practical in elasticity.

• B.Sc. physics: modulus of rigidity of a rod by the statical method.
• Comparing the rigidity of brass and steel using the two supplied rods.
• Engineering materials lab: plotting angle of twist against applied couple.

Standard Scope of Supply

You receive the two cast iron feet with supporting rods, the 165 mm wheel with its split collet chuck, the rear clamping block, two brass 30-0-30 degree scales on pillar supports, two clamp-on pointers, one brass and one steel test rod, and the cord with hook. Slotted masses are not included.

Packing, MOQ and Lead Time

As a physics instruments supplier in India, Science Lab Supplies quotes for a single apparatus or for several benches for a practical class. Each quotation details packing, delivery time and price for the requested quantity, and a mass set or the one metre rod version can be priced alongside.

With an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Tanzania, Uganda, the UAE, Saudi Arabia, Oman and the Philippines. The business is registered under Udyam as a manufacturing enterprise (UDYAM-HR-01-0014546) and for GST (GSTIN 06ADEPJ0574F2ZU). Use the contact page for questions, the enquiry cart for a list of items, or the lab tender page for tenders.

Frequently Asked Questions

Are weights supplied with the Searle's torsion apparatus?
No. The apparatus includes the cord and hook for carrying masses but no weights. A suitable slotted mass set can be added to the same quotation if your lab does not already have one.

Which test rods come with it?
One brass rod and one steel rod are included, so two materials can be compared in the same practical. A version with a one metre long rod is also available on request.

How is the angle of twist read?
Two pointers clamp onto the specimen, and each moves over a brass scale graduated 30-0-30 degrees. The scales sit on pillar supports that can be moved along the rod to set the gauge length.

Is Science Lab Supplies the maker or a reseller?
Science Lab Supplies is the maker. This torsion apparatus is produced at its factory in Saha, Ambala, India, so pricing and technical answers come straight from the production unit.

Related Rigidity Apparatus

These four items round out a rigidity and elasticity bench. They give a second static method, two dynamic methods and a mass set for loading, so a college lab can let students compare results for the modulus of rigidity, and each can be included on the same quotation.

• Torsion (Barton's) Apparatus Vertical Pattern — vertical frame with three test rods and scale pans.
• Torsion Pendulum — dynamic method with a brass disc and ring.
• Maxwell Vibration Needle — rigidity experiment using a hollow brass tube.
• Laboratory Slotted Masses, 2.5 kg — mass set for applying static loads.

Browse the full Applied Mechanics range or all physics lab equipment.

Last updated: 25 September 2026