Precision Metric Ball Screw Assembly, Cylindrical Single Nut with Keyway, 40 x 40 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 MBN40x40R-8CW
Product Info
Nominal Rod Diameter [mm] 40
Material Alloy
Thread Direction RH
Lead [mm] 40
Active Turns 8
Nominal Ball Dia. [mm] 6.350
Screw Weight [kg/m] 8.06
Nut Weight [kg] 1.85
End Code for Types 1,2, and 3 30
End Code for Types 4 19
End Code for Types 5 25
End Code for Types 6 30
End Code for Types 7 30
Performance Specifications
Dynamic Load Ca [N] 75440
Static Load [N] 181330
Linear Speed (Based on DN Values) [mm/min] 70000
Screw Dimensions
d0 [mm] 40
d1 [mm] 38.49
d2 [mm] 33.45
Nut Dimensions
D1 (g6) [mm] 70
L1 [mm] 60
Dp [mm] 2.4
Lp1 [mm] -
Dp1 [mm] -
L [mm] 102
Lx [mm] 67
Lz [mm] 10
L4 [mm] 40
B (P9) [mm] 5

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