Ballscrews Tolerances of Run-out and Perpendicularity

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Tolerances of Run-out and Perpendicularity

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Tolerances of Run-out and Perpendicularity
The method of supporting the ballscrew whilst measuring ensures that the values taken are free from the influence of the possible bending of the screw due to its weight. In general it is sufficient to support the screw between centers. For very long screws it is recommended to prevent against such influences by selecting a different method.
The values listed below represent general rules. For distinct applications, tolerances may vary.

Run-out t₂

Nominal Diameter d_N [mm]		Run-out tolerance t₂Grade [µm]
over	to	0	1	2	3	5	7	10
16	20	5	7	9	10	13	16	19
20	32	6	8	10	11	14	17	20
32	50	7	9	12	13	16	19	22
50	80	8	10	13	14	18	20	24

Run-out t₃

Nominal Diameter d_N [mm]		run-out tolerance t₃Grade [µm]
over	to	0	1	2	3	5	7	10
16	20	4	6	8	9	12	15	18
20	32	5	7	9	10	13	16	19
32	50	6	8	11	12	15	18	21
50	80	7	9	12	13	17	20	23

Perpendicularity t₄

Nominal Diameter d_N [mm]		Perpendicularity tolerance t₄Grade [µm]
over	to	0	1	2	3	5	7	10
16	20	2	3	3	4	5	7	9
20	32	2	3	4	4	5	7	9
32	50	2	3	4	4	5	7	9
50	80	3	4	5	5	7	10	13

Perpendicularity t5

Nominal Diameter d_N [mm]		Perpendicularity t₅Grade [µm]
over	to	0	1	2	3	5	7	10
16	20	7	8	9	10	12	15	18
20	32	7	8	9	10	12	15	18
32	50	8	9	10	10	13	16	19
50	80	9	10	11	12	15	18	21

Run-out t₆

Nominal Diameter d_N [mm]		Run-out tolerance t₆Grade [µm]
over	to	0	1	2	3	5	7	10
16	20	5	6	7	8	10	13	16
20	32	5	6	7	8	10	13	16
32	50	6	7	8	8	11	14	17
50	80	7	8	9	10	13	16	19