Maximum Speed

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The DN value does not take lead and ball size into consideration. In general, ball screws with very small balls have somewhat lower speed limits than screws with larger balls. We strongly recommend observing the speeds in the three tables below instead of DN values.

Steinmeyer has however the ability to increase speed ratings beyond these values. Please inquire.

Maximum speeds [rpm] ground ball screws nominal diameter 3 - 16 mm (rolled ball screws 30% lower)

P	d 3mm	d 5mm	d 6mm	d 8mm	d 10mm	d 12mm	d 16mm
0,5	4500	2900	2900	1800	-	-	-
1	4500	4500	4500	3000	2000	2000	-
1,5	-	4500	4500	3500	2500	2500	-
2	-	4500	4500	4500	3700	3700	2800
2,5	-	4500	4500	4500	4000	4000	3500
3	-	4500	4500	4500	4500	4500	4000
4	-	-	4500	4500	4500	4500	4300
5	-	-	4500	4500	4500	4500	4300
6	-	-	4500	4500	4500	4500	4300
8	-	-	-	4500	4500	4500	4300
10	-	-	-	-	4500	4500	4300
12	-	-	-	-	-	4500	4300
15	-	-	-	-	-	4500	4300
20	-	-	-	-	-	4500	4300
25	-	-	-	-	-	-	4300
30	-	-	-	-	-	-	4300

Maximum speeds [rpm] ground ball screws nominal diameter 20 - 125 mm (rolled ball screws 30% lower)

First number: Maximum speed with internal ball return (1XXX)
Second number: Maximum speed with external ball return (3XXX)

P	d 20mm	d 25mm	d 28mm	d 32mm	d 36mm	d 40mm	d 50mm	d 60mm	d 63mm
2	2200	1800	-	-	-	-	-	-	-
2,5	4100	2500	-	-	-	-	-	-	-
3	4100	3000	-	-	-	-	-	-	-
4	4100	3600	-	2800	-	-	-	-	-
5	4100	3800	3800	3300	3300	2600	2100	-	1700
6	4100	3800	3800	3400	3400	3000	2200	-	1700
8	4100	3800	3800	3400	3400	3000	2400	-	1800
10	4100	3800	3800	3400	3400	3000	2500	-	2000
12	4100	3800	3800	3500	3500	3000	2500	-	2000
15	4100	3800	3800	3600	3600	3000	2500	-	2000
20	4100	4000	4000	4000	4000	3000/4000	2500/3000	-	2000/2500
25	4100	4000	4000	4000	4000	4000	3000	2500	2000
30	4100	4000	4000	4000	4000	4000	3000	2500	2000
35	4100	4000	-	-	-	4000	3000	2500	2000
40	4100	4000	-	-	-	4000	3000	2500	2000
50	-	4000	-	-	-	-	3000	2500	-

P	d 80mm	d 100mm	d 125mm
2	-	-	-
2,5	-	-	-
3	-	-	-
4	-	-	-
5	1200	1000	800
6	1200	1000	800
8	1200	1000	800
10	1500	1200	1000
12	1500	1200	1000
15	1500	1200	1000
20	1500	1600	1000
25	2000	1600	1200
30	2000	1600	1200
35	2000	1600	1200
40	2000	1600	1200
50	2000	1600	-

Maximum speeds for UltraThrust ball screws diameter 32 - 125 mm [rpm]

P	d 32mm	d 36mm	d 40mm	d 50mm	d 63mm	d 80mm	d 100mm	d 125mm
10	3000	3000	3000	2500	-	-	-	-
12	3000	-	3000	2500	-	-	-	-
16	-	-	-	2500	2000	-	-	-
20	-	-	-	-	2000	1500	1200	1000
25	2000	1500	1200	1000
30	-	-	3500	-	-	-	-	-
40	-	-	-	2800	2200	1800	1400	1100
50	-	-	-	-	-	1800	1400	1100

Technical Tip

DN values only yield a preliminary idea of the maximum speed, because there are more factors than just the nominal diameter and the type of ball return that affect speed rating. Specifically the mass of balls plays an important role, which is not reflected in DN ratings. Also, the DN method to determine maximum speeds is not applicable for very small screws.