Precision Metric Ball Screw Assembly, Single Nut with Flange, 20 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™). A precision metric ball screw assembly is 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.


  • Utilizing precision thread-rolling technology
  • Wide range of diameters and leads
  • T3, T5, T7, and T10 lead accuracy per ISO 3408-3
  • DIN-style flanges
  • Preloaded and clearance nuts
  • State-of-the-art ball return mechanisms
  • Integral wipers

To configure a part number, download 2D/3D models, or request a quote, please select the "Quote or Download" tab and click the "Configure" button. (Step 4 of 4)

Product MBN20x5R-4FW
Product Info
Nominal Rod Diameter [mm] 20
Material Alloy
Thread Direction RH
Lead [mm] 5
Active Turns 4
Nominal Ball Dia. [mm] 3.500
Screw Weight [kg/m] 1.96
Nut Weight [kg] 0.35
Lube Hole Locaton L
End Code for Types 1,2, and 3 15
End Code for Types 4 10
End Code for Types 5 15
End Code for Types 6 15
End Code for Types 7 15
Performance Specifications
Dynamic Load Ca [N] 14560
Static Load [N] 25580
Linear Speed (Based on DN Values) [mm/min] 17500
Screw Dimensions
d0 [mm] 20
d1 [mm] 19.26
d2 [mm] 16.38
Nut Dimensions
D1 (g6) [mm] 36
L [mm] 57
L1 [mm] 10
Lx [mm] 34
Lz [mm] 8
L3 (min) [mm] 5.5
L7 [mm] 10
L8 [mm] 44
D4 [mm] 47
D5 [mm] 6 × 6.6
D6 [mm] 58

To continue, please configure your item below.

Profile Rail Systems and Runner Blocks

Linear Bearings and Pillow Blocks

Linear Shafting and Shaft Supports

Screw Accessories - Ball Screw Lubricant