Gear Racks

Gear racks are an economic drive element, especially with long strokes of more than 2 m.

Gear racks are preferred also with dirty environments and/or big axial forces. The stiffness  is the same over the whole length.

SCHNEEBERGER offers any cross-section up to module 20 with metric or module pitch, with helical or straight gears. The maximum single piece length is 3000 mm, multi-piece butt jointed rails for longer lengths are warranted.

The teeth can be milled or ground, according to your wish. Interesting are the various  hardening processes, depending on the applying load. Weak, inductive hardened or  case hardened gear racks are available. The best gear quality is Q4 (individual adjacent pitch error fp=0,003 mm, cumulative pitch error Fp=0,015/1000 mm).

Q7 Helical Gear Module Technical Information

Gear                     :  Grip angle α = 20ᵒ ground, soft or hardened

Gear surfaces       :  All surfaces are ground

Quality                 :  (According to DIN 3962, 3963, 3067) Q7

Fp (mm)                  One-tier deviation

                               Module ≤ 3:0.007

                               Module  ˃3:0.009

Fp (mm)                  Total deviation 

Fp/1000(mm)           0.060 at 1000 mm

Fp/2000(mm)           0.075 at 2000 mm