Torque Fatigue Testing
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This auction ended on January 31, 2017 @ 12:00 AM EST

Torque Fatigue Testing

Listed By: sales     No ratings yet   View rating history and comments

Auction Description

We want to source the fatigue test applicable for a Brake Caliper that is the product that we build, then I want to be in the same page of what the fatigue test is :

1. Test Procedure
a. Mounting – Mount the caliper in vehicle position with either a production knuckle with a hub and a rotor or a fixture simulating normal caliper mounting. Torque the caliper guide pin bolts, anchor bolts, bleedscrews, and inlet port fittings.
b. Pressure – Apply hydraulic pressure to the caliper sufficient to achieve the require test torque.
c. Torque – Apply torque in the forward direction (TF) and torque in the reverse direction (TR). Forward direction and reverse direction refer braking torque in reference to vehicle direction, the torques listed are calculated for a vehicle loaded to GVW and making 1.1g forward (with weight transfer) stops and 0.9g reverse (with weight transfer) stops. Torque Specs will be provided by BBB Industries.
d. Cycle – Cycle the torque at a rate of 10 cycles/min for 10,000 cycles, One cycle consist of ten (10) forward and one (1) reverse application. Torque of each cycle must be recorded
e. Torque Loss Check – Record the amount of torque loss experienced for all fastener joints.
f. Breakaway Pressure Check – Record piston breakaway pressure.

2. Acceptance Requirements
a. No fluid leakage during the 10,000 cycles and no cracks or tears detectable present in the caliper, piston, locating pins or anchor bracket.
b. A maximum of 10% loss torque on the caliper guide pin bolts, anchor bolts, bleedscrews and inlet port fitting.
c. The piston must move smoothly in the bore under a pressure of no more than 345 kPa after breakaway. Breakaway pressure must not exceed 1,035 kPa.

Auction Timeframe

Available for Start
At auctions end
Required Completion
At auctions end


Fatigue Testing
High Cycle Fatigue (HCF) Testing
Performance Testing
Pressure & Temperature Testing


No specific accreditations required


No questions or comments found

Russia Area Approvals Made Simple - CISCERT - Visit to learn more. First 10 customers that mention they saw this ad on receive their certificates at no cost. Testing, shipping samples and government fees are extra.
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