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Metric Stepper Motors Dimensions Table

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Stepper Control Motors Size and Dimensions Table for metric mounting flanges. NEMA Mounting Flanges for NEMA Frames 55 to 1080.

Note: This document annotates dimensional data specified by NEMA standard (see bottom of webpage). Many industry stepping motor manufacturers have chosen to deviate from this industry standard.

Dimensions for mounting flanges for metric dimension motors

ICS 16-2001 Page 52

Flange Number M	BDa (square flange) maximum	N			P Maximum	Number of holes	S Free holes (for FF flange)			Tapped Holes (for FT flange) thread	T Maximum mm
		Nominal mm	Tolerance				Nominal mm	Tolerance
			µm	µm				µm	µm
55	53	40	+0	-16	70	4	5.8	+300	0	M5	2.5
65	60	50	+0	-16	80	4	5.8	+300	0	M5	2.5
70	60	50	+0	-16	80	4	5.5	+300	0	M5	2.5
75	70	60	+0	-25	90	4	5.8	+300	0	M5	2.5
85	80	70	+0	-25	105	4	7	+360	0	M6	2.5
100	90	80	+0	-30	120	4	7	+360	0	M6	3
115	105	95	+0	-35	140	4	10	+360	0	M8	3
130	120	110	+0	-35	160	4	10	+360	0	M8	3.5
145	130	110	+0	-35	165	4	9	+360	0	M8	3
165	140	130	+0	-35	200	4	12	+430	0	M10	3.5
200	174	114.3	+0	-25	225	4	13.5	+430	0	M12	4
215	190	180	+0	-35	250	4	14.5	+430	0	M12	4
265	225	230	+0	-40	300	4	14.5	+430	0	M12	4
300	265	250	+0	-45	350	4	18.5	+520	0	M16	5
350	300	300	+0	-52	400	4	18.5	+520	0	M16	5
400	340	350	+0	-57	450	8	18.5	+520	0	M16	5
500	415	450	+0	-57	550	8	18.5	+520	0	M16	5
600	495	550	+0	-57	660	8	24	+520	0	M20	6
740	600	680	+0	-57	800	8	24	+520	0	M20	6
940	750	880	+0	-57	1000	8	28	+520	0	M24	6
1080	865	1000	+0	-57	1150	8	28	+520	0	M24	6

^a BD dimensions shown (for non-circular flanges) are approximate values for reference only. An actual BD value is determined by themanufacturer. For square flanges, the BD value chose n by the manufacturer may require rounding of the square flange corners to fitwithin the P maximum diameter values shown.

Reference: NEMA ICS 16 Standard