What is the primary performance test for a mortice ball catch?

An endurance test requiring the catch to withstand 10,000 cycles of operation without failure or significant wear (Clause 7.2).

What materials are specified for the body of the catch?

The body is typically made from brass sheet or strip conforming to IS 410 or another suitable material as agreed upon (Clause 3.2).

Does this standard specify the screws for fixing the catch?

No, but it requires the manufacturer to supply suitable countersunk head wood screws along with each catch (Clause 9.1).

What are the requirements for the finish?

The catch should be finished smooth and be free from burrs and sharp edges. It can be nickel-plated, chrome-plated, or have another protective coating as required (Clause 5).

IS 8756

: 1978

Specification for mortice ball catches for use in the wooden almirah

CurrentSpecializedSpecificationArchitectural · Builder Hardware

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This standard specifies the material, dimensional, manufacturing, and performance requirements for mortice-type ball catches. These catches are designed to be installed in wooden almirahs and other similar cabinetry to hold doors in the closed position.

Specification for mortice ball catches for use in the wooden almirah

Quick Reference Values

Minimum endurance test cycles10000 cycles

Minimum withdrawal force15 N

Maximum withdrawal force40 N

Body diameter (Size 1)21.0 mm

Body diameter (Size 2)24.0 mm

Striking plate thickness1.0 mm

Practical Notes

This is a product-specific standard primarily used by hardware manufacturers and quality control departments.

Though published in 1978, this standard has been reaffirmed (e.g., in 2018), indicating it is still in force for the manufacturing of this component.

The standard covers two common sizes of ball catches, and selection depends on the size and weight of the shutter.