Pinions

Light Duty Pinions

A range of module 5, 6 and 8 (metric) and DP 4 pilot bore pinions in C45 steel to match the internally and externally geared light series slewing rings (metric and inch sizes) are available.

These are suitable for many light industrial applications.

Usually supplied in pilot bore form we can offer with fully machined bore, or in other tooth modules to order, and in high strength alloy steel and nitride hardened if necessary.

High torque / special design pinions

Heavy-duty applications call for specially designed pinions.

All geared QCB slewing rings are manufactured in 42CrMo4 steel to offer higher tooth strength.

Tooth strength is a function of the module, the gear face width and the allowable root stress (which varies depending on section and material). Slewing ring tooth strength can be improved by adding an ‘addendum correction’, and it is vitally important that the pinion geometry is properly matched to achieve an optimum mesh and maximum gear efficiency.

With fixed centre systems, it is also important to design in suitable backlash to avoid overpressure.

QCB uses state-of-the-art software and its years of experience to ensure that our pinions offer exceptional service life in high-torque applications.

Heavy duty pinions are manufactured in the UK using high-strength alloy steel such as 42CrMo4 and can be induction hardened or nitrided to improve durability.