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Selecting a Screw Shaft

Maximum Manufacturing Lengths of Screw Shafts

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Table 15 shows the maximum manufacturing lengths of precision ball screws by accuracy grade, Table 16 shows the maximum manufacturing lengths of precision ball screws compliant with ISO standards by accuracy grade, and Table 17 shows the maximum manufacturing lengths of rolled ball screws by accuracy grade.
If the shaft dimensions exceed the maximum manufacturing lengths in Table 15, Table 16, or Table 17, contact THK.

Table 15: Maximum Manufacturing Lengths of Precision Ball Screws by Accuracy Grade
Unit: mm
Note: For ball screw models HBN-V, HBN-K (KA), HBN, and SBKH, the standard maximum length of the screw shaft is 3,000 mm.
For lengths greater than this, please contact THK.
Screw shaft
outer diameter		 Overall screw shaft length
C0 C1 C2 C3 C5 C7
4 90 110 120 120 120 120
6 150 170 210 210 210 210
8 230 270 340 340 340 340
10 350 400 500 500 500 500
12 440 500 630 680 680 680
13 440 500 630 680 680 680
14 530 620 770 870 890 890
15 570 670 830 950 980 1,100
16 620 730 900 1,050 1,100 1,400
18 720 840 1,050 1,220 1,350 1,600
20 820 950 1,200 1,400 1,600 1,800
25 1,100 1,400 1,600 1,800 2,000 2,400
28 1,300 1,600 1,900 2,100 2,350 2,700
30 1,450 1,700 2,050 2,300 2,570 2,950
32 1,600 1,800 2,200 2,500 2,800 3,200
36 2,000 2,100 2,550 2,950 3,250 3,650
40 2,000 2,400 2,900 3,400 3,700 4,300
45 2,000 2,750 3,350 3,950 4,350 5,050
50 2,000 3,100 3,800 4,500 5,000 5,800
55 2,000 3,450 4,150 5,300 6,050 6,500
63 2,000 4,000 5,200 5,800 6,700 7,700
70 2,000 4,000 6,300 6,450 7,650 9,000
80 2,000 4,000 6,300 7,900 9,000 11,000
100 2,000 4,000 6,300 11,000 11,000 11,000
Table 16: Maximum Manufacturing Length of Precision Ball Screws (ISO Standard-Compliant Ball Screws)
Unit: mm
Shaft diameter Ground shaft CES shaft
C3 C5 C7 Cp3 Cp5 Ct5 Ct7
16 1,050 1,100 1,400 1,050 1,100 1,100 1,400
20 1,400 1,600 1,800 1,400 1,600 1,600 1,800
25 1,800 2,000 2,400 1,800 2,000 2,000 2,400
32 2,500 2,800 3,200 2,500 2,800 2,800 3,200
40 3,400 3,700 4,300 3,400 3,700 3,700 4,300
50 4,500 5,000 5,800 — — — —
63 5,800 6,700 7,700 — — — —
Table 17: Maximum Manufacturing Lengths of Rolled Ball Screws by Accuracy Grade
Unit: mm
Note: For details, refer to Maximum Manufacturing Lengths of Screw Shafts.
Screw shaft
outer diameter		 Overall screw shaft length
C7 C8 C10
6 to 8 320 320 -
10 to 12 500 1,000 -
14 to 15 1,500 1,500 1,500
16 to 18 1,500 1,800 1,800
20 2,000 2,200 2,200
25 2,000 3,000 3,000
28 3,000 3,000 3,000
30 3,000 3,000 4,000
32 to 36 3,000 4,000 4,000
40 3,000 5,000 5,000
45 3,000 5,500 5,500
50 3,000 6,000 6,000

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