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Worm and Roller Type Manufacturer,Supplier and Exporter in India

Product Code : EL-AELE-9407
Jlab Export is a leading Worm and Roller Type Manufacturer,and suppliers in India

A steering gear model of the worm and roller type, it shows how an hourglass-shaped worm on the steering shaft drives a roller. As the steering wheel turns the worm, the roller turns with it and forces the sector and pitman arm shaft to rotate. The roller runs on ball or roller bearings within the sector, which cuts sliding friction. The design gives a variable steering ratio for quicker steering.

Specifications

Model of	Worm and roller steering gear
Worm	Hourglass shape, tapering from both ends to the centre
Roller	On ball or roller bearings within the sector
Output	Sector and pitman arm shaft
Steering ratio	Variable
Minimum order quantity	1 unit
Dispatch time	Usually 14–18 working days
Manufacturer	JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India

Lab Exercises on Steering Gear Action

Students trace the drive from the worm through the roller and sector to the pitman arm shaft, naming each part. They compare the rolling contact of the roller with the sliding contact of a plain worm and sector. Less friction means lighter steering and slower wear. Then they show how the hourglass worm keeps the roller in mesh as it swings through its arc.

To see the same gear in a full system, the class moves to the Steering System Actual Working, a worm and roller steering system built from actual parts. They follow the linkage out from the pitman arm. The Model Steering Jeep With Stub Axle then shows how the steering box, tie rod and linkages turn the stub axles.

Frequently Asked Questions

How does a worm and roller gear differ from a worm and sector gear?
The two are quite similar. In a worm and sector gear, the sector teeth slide on the worm. Here a roller, supported by ball or roller bearings within the sector, rolls in the worm thread instead, so friction and wear are lower.

Why is the worm shaped like an hourglass?
The roller moves in an arc as the sector turns. A worm that tapers from both ends to the centre follows that arc. The roller then keeps good contact with the thread in all positions, from straight ahead to full lock.

What is a variable steering ratio?
The steering ratio is how far the steering wheel turns for a given movement of the road wheels. In a variable ratio gear it changes across the travel. This design uses that to give faster steering than a fixed ratio would.

Which vehicles use worm and roller steering?
Steering boxes of this type are found on many older cars, jeeps and light commercial vehicles with a pitman arm linkage. Most modern cars use rack and pinion steering, and heavy vehicles often use the Recirculating Ball Type gear.