Clamping Sets BAR, QPQ-Coated, boreholes 5 - 50 mm

Material: 11SMnPb37

- For fixing a hub on a shaft.
- QPQ coated: High corrosion resistance, improved fatigue strength,
primarily food safe (further information see below).
- For medium torques.
- Self-centering.
- Slight axial offset possible during assembly.

Fit, Surface:
Due to the special design of the BAR clamping set even rough fits can
be bridged with excellent self centering capacity.
Shaft and hub up to Quality h9/H9.
Surface finish for shaft and hub < 12µm.

QPQ Surface Properties:
Very good corrosion resistance, better than hard chrome or chem. nickel. Corrosion resistance in the salt spray test SS CASS in accordance with DIN 50021.
Layer thickness of 10 - 25 µm possible. For medium operational demands we recommend a layer thickness of 15 µm at a 90 minute treatment.
Only very small changes in dimensions (only 5 µm), as the surface modification is achieved through diffusion and not application.
Surface hardness same as clamping set material = 350 HV.
Improved wear resistance, no fretting corrosion, no cold shut.
Increased endurance strength, sometimes up to 100% higher.
Is completely safe to use with food as long as there is no contact with any acidic substances with a pH-value of = 4.