NPR planetary gearbox

  • NPR – Planetary gearbox with new output geometry – Adapted for linear applications
  • NPR – planetary gearboxes with slotted holes for perfect rack and pinion mounting

  • Value Linear System with planetary gearbox NPR
  • Motor mounting alpha Value Line Planetary and right-angle gearboxes

Individual Talents

The NPR planetary gearbox, another member of the alpha Value Line, is designed for applications with average demands in terms of positioning accuracy. The NPR particularly impresses with its slotted holes in the output flange and is perfect for rack and pinion mounting. 

Customized solutions

We will develop a solution for you that is tailored to your drive needs. You will benefit from our years of experience, our highly skilled staff and our services. Please contact us.

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WITTENSTEIN alpha GmbH - Walter-Wittenstein-Str. 1


Walter-Wittenstein-Str. 1

97999 Igersheim (Germany)

  • Technical data
  • Options
Product type NPR
Version MF / MA
Ratio c) 3 - 100
Number of sizes 4

Max. backlash c)

jt [arcmin]Standard

≤ 8

Max. torqueT2a [Nm]51 - 800
Max. input speedn1Max [rpm]8000

c) In relation to reference sizes

Output shape 
Smooth shaft

Shaft with key d)

Splined shaft (DIN 5480)
Input shape 


Flange with slotted holes (standard)
Food-grade lubrication a) b)
System solutions 
Linear system (rack / pinion)
Accessory (please refer to the product pages for further information) 

a) Performance reduction: Technical data available on request

b) Please contact WITTENSTEIN alpha

d) Performance reduction: Please use our sizing software cymex® for a detailed sizing

Product Highlights

Two-piece clamping hub system of the high-end segment

  • Labeled with the tightening torques for secure, fast motor mounting 
  • Guarantees best synchronization properties

Output shape

  • Available with smooth shaft and slot holes
  • Higher external forces possible

High ratio variation

  • Large number of ratios (i=3 to i=100)
  • Available in the common binary ratios

Differentiated power density

The HIGH TORQUE version permits an even higher torque density for sizes 015 – 035

WITTENSTEIN alpha in all axes

Low backlash planetary gearboxes

WITTENSTEIN alpha develops complete, single-supplier solutions for any driving axis. They can be used in virtually any application – from high-precision axes in manufacturing systems to packaging machinery where maximum productivity is required. 
The name WITTENSTEIN alpha is a byword for premium quality and reliability, high precision and synchronization accuracy, highest power density, a long lifetime and very simple motor mounting.