Pre Stresser

Pre Stresser



The principle of the Pre-Stresser is to support the rim and put a load on the hub area. This way the spokes on one side of the wheel will be stretched and on the other side released.

It Pre Stresser can pick up any wheel from 20”- 29” and is equipped with a wheel database whereby force and displacement for each individual wheel can be stored. 

This process results in a more equal tension over of the spokes, whereby the robot has a quicker run time to true the wheel.

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• Diameter Range 20 – 28 inch

• Rim width up to 110 mm

• One Cycle Pre-stressing

• Pre-Stressing Load up to 4.858 N (1.092 lbf) @ 5 bar

• Option to boost up to 9.715 N (2.184 Ibf) @ 10 bar

• Pre-stressing Action up to 30 mm travel

• Wheel Library for 500 wheels

• Teach-in setup

• One button change over from memory

• Individual Load setting per wheel

• Individual Load setting Drive/Non-Drive side

• Individual Pre-Stressing travel limit (mm) per wheel

• Plastic lining of pre-stressing disk to protect the rim from scratching

• Pressing force is applied on the hub anges (option: on wheel axle)

Automatic Cycle

1. Wheel rolls into machine against machine wheel stop

2. Wheel clamp diabolo positions the wheel in upright position

3. Hub clamps pick up the wheel by the hub

4. Hub clamps position the wheel in the center of the disk

5. Actuators press the wheel to the le and right disks with required force

6. Hub clamps lower the wheel into the machine track

7. Wheel stop releases the wheel and the wheel rolls out

8. Estimated cycle time: ±25 seconds

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