Note:
Stiff ness values listed above are derived from theoretical formula to the elastic deformation between thread grooves and balls while axial load is 30% dynamic load rating.

Unit:mm
Screw size Ball DIA.

Effeftive turns
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 BASIC RATE LOAD(kgf) BALLNUT DIMENSION Nut Model No.
O.D. Length Flange Assembly
Hole		 Oil Hole STIFFNESS
O.D. Lead Dynamic
(1×106 REV.)
Ca

Static

Co

 D

L

 A T W H X Q kgf/μm
12 5 2.000 2.5x1 270 350 26 40 47 10 37 30 4.5 M6x1P 8.2 FSBW1205Z-2.5P
14 4 2.381 3.5x1 500 1100 31 40 50 10 40 37 4.5 M6x1P 15 FSBW1404A-3.5P
5 3.175 2.5x1 515 990 32 40 50 10 40 38 4.5 M6x1P 11 FSBW1405B-2.5P
16 5 3.175 2.5x1 570 1130 34 40 54 10 44 40 4.5 M6x1P 13 FSBW1605B-2.5P
20 4 2.381 2.5x1 415 850 40 41 59 10 50 46 4.5 M6x1P 14 FSBW2004A-2.5P
5 3.175 2.5x1 620 1450 40 40 59 10 50 46 4.5 M6x1P 16 FSBW2005B-2.5P
25 4 2.381 2.5x1 450 980 43 41 67 10 50 50 4.5 M6x1P 17 FSBW2504A-2.5P
5 3.175 2.5x1 720 1830 43 40 67 10 50 50 5.5 M6x1P 18 FSBW2505B-2.5P