Precision Metric Ball Screw Assembly, Cylindrical Single Nut with Keyway, 25 x 5 RA

Nook Industries has always been a leader in developing high quality linear motion components and systems to meet the ever increasing demand for precision linear motion. Precision-rolled ball screws have long been a hallmark of Nook Industries, and the latest innovations from Nook Industries are Precision Metric Ball Screws (PMBS™). They are manufactured in the United States to meet the increasing demand for metric ball screws in the global market.

Mounting dimensions per DIN69 051 part 5 Type c.


  • The Cylindrical nut offers a solution for mounting in a housing.
  • Utilizing precision thread-rolling technology
  • Wide range of diameters and leads
  • T3, T5, T7, and T10 lead accuracy per ISO 3408-3
  • Preloaded and clearance nuts
  • State-of-the-art ball return mechanisms
  • Integral wipers

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Product MBN25X5R-4CW
Product Info
Nominal Rod Diameter [mm] 25
Material Alloy
Thread Direction RH
Lead [mm] 5
Active Turns 4
Nominal Ball Dia. [mm] 3.500
Screw Weight [kg/m] 3.21
Nut Weight [kg] 0.19
End Code for Types 1,2, and 3 20
End Code for Types 4 12
End Code for Types 5 20
End Code for Types 6 20
End Code for Types 7 20
Performance Specifications
Dynamic Load Ca [N] 16380
Static Load [N] 32880
Linear Speed (Based on DN Values) [mm/min] 14000
Screw Dimensions
d0 [mm] 25
d1 [mm] 24.26
d2 [mm] 21.38
Nut Dimensions
D1 (g6) [mm] 38
L1 [mm] 25
Dp [mm] 1.5
Lp1 [mm] -
Dp1 [mm] -
L [mm] 46
Lx [mm] 36
Lz [mm] 7
L4 [mm] 20
B (P9) [mm] 5

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