NPRK bevel gearboxes

  • NPRK bevel gearbox with output shaft

  • NPRK bevel gearbox with slot holes for optimal rack and pinion mounting

Individual Talents

The NPRK bevel gearbox of the alpha Value Line impresses with its slotted holes and is therefore a perfect solution 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 NPRK
Version MF
Ratio c) 3 - 100
Number of sizes 4

Max. backlash c)

jt [arcmin]Standard

≤ 11

Max. torqueT2a [Nm]33 - 700
Max. input speed 5000

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

High flexibility

High economy

The gearboxes of the alpha Value Line are very economical to purchase, unbeatably efficient in operation, and maintenance free over their entire service life.

Flexible motor connection

Mounting of all common servo motors by means of a flexible and screw-fastened adapter plate as well as a large number of motor shaft diameters.


The elegant design underlines the dynamics of the gearbox and sets new standards on the market


The extremely compact design of the angle section enables use in very confined installation spaces

High ratio variation

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

Flexible motor connection

  • Mounting of all common servo motors by means of a flexible and screw-fastened adapter plate
  • Large number of motor shaft diameters connectable

Output shape

Higher external forces possible with NPRK

WITTENSTEIN alpha in all axes

Right-angle 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.