KHK Web Catalog Dimension table

[Spiral Miter Gears (MMSA·MMSB)] Series list

diagram

Spiral Miter Gears (MMSA·MMSB)

Specifications
Precision grade	JIS B 1704 grade 4	Surface hardness	HRC55 - 60
Gear teeth	Gleason	Surface treatment	-
Pressure angle	20°	Surface finish	Cut
Helix angle	35°	Datum reference surface for teeth cutting	Bore (H7)
Material	SCM415	Modifications	Not possible
Heat treatment	Overall carburizing

b3012

b3002

b4002

b7001

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全 40 items in total

Module

No. of Teeth

< 1 >

precaution

Catalog No.

Module	Number of Teeth	Hand of thread	Shape	Bore A	Hub dia. B	Pitch dia. C	Outside dia. D	Mounting distance E	Total length F	Crown to back length G	Hub width H	Length of bore I	Face width J	Holding surface dia. K	Keyway Width	Keyway Depth	Thread Size	Threaded hole L	Allowable torque(kgf·m) Bending strength	Allowable torque(kgf·m) Surface durability	Backlash low (mm)	Backlash up (mm)	Weight (kg)	Unit Price Click Here	Partner

MMSA1-20R

MMSB1-20R

MMSA1-20L

MMSB1-20L

MMSA1.5-20R

MMSB1.5-20R

MMSA1.5-20L

MMSB1.5-20L

MMSA2-20R

MMSB2-20R

MMSA2-20L

MMSB2-20L

MMSA2.5-20R

MMSB2.5-20R

MMSA2.5-20L

MMSB2.5-20L

MMSA3-20R

MMSB3-20R

MMSA3-20L

MMSB3-20L

MMSA3.5-20R

MMSB3.5-20R

MMSA3.5-20L

MMSB3.5-20L

MMSA4-20R

MMSB4-20R

MMSA4-20L

MMSB4-20L

MMSA5-20R

MMSB5-20R

MMSA5-20L

MMSB5-20L

MMSA6-20R

MMSB6-20R

MMSA6-20L

MMSB6-20L

MMSA8-20R

MMSA8-20L

MMSA10-20R

MMSA10-20L

1	20	R	BT	8	17	20	21.29	20	13.53	10.64	8.5	12.2	4.5	11.67			2-M4	4.5	0.23	0.21	0.03	0.13	0.018		MMSA1-20L
1	20	R	BT	10	17	20	21.29	20	13.53	10.64	8.5	12.2	4.5	11.67			2-M4	4.5	0.23	0.21	0.03	0.13	0.015		MMSB1-20L
1	20	L	BT	8	17	20	21.29	20	13.53	10.64	8.5	12.2	4.5	11.67			2-M4	4.5	0.23	0.21	0.03	0.13	0.018		MMSA1-20R
1	20	L	BT	10	17	20	21.29	20	13.53	10.64	8.5	12.2	4.5	11.67			2-M4	4.5	0.23	0.21	0.03	0.13	0.015		MMSB1-20R
1.5	20	R	BT	10	25	30	31.9	28	18.48	13.95	10.5	16.5	7	17.2			2-M4	6	0.79	0.75	0.05	0.15	0.057		MMSA1.5-20L
1.5	20	R	BK	12	25	30	31.9	28	18.48	13.95	10.5	16.5	7	17.2	4	1.8	M5	6	0.79	0.75	0.05	0.15	0.052		MMSB1.5-20L
1.5	20	L	BT	10	25	30	31.9	28	18.48	13.95	10.5	16.5	7	17.2			2-M4	6	0.79	0.75	0.05	0.15	0.057		MMSA1.5-20R
1.5	20	L	BK	12	25	30	31.9	28	18.48	13.95	10.5	16.5	7	17.2	4	1.8	M5	6	0.79	0.75	0.05	0.15	0.052		MMSB1.5-20R
2	20	R	BK	14	35	40	42.52	35	22.09	16.26	12.5	20	9	24.54	5	2.3	M5	7	1.83	1.76	0.06	0.16	0.13		MMSA2-20L
2	20	R	BK	16	35	40	42.52	35	22.09	16.26	12.5	20	9	24.54	5	2.3	M5	7	1.83	1.76	0.06	0.16	0.12		MMSB2-20L
2	20	L	BK	14	35	40	42.52	35	22.09	16.26	12.5	20	9	24.54	5	2.3	M5	7	1.83	1.76	0.06	0.16	0.13		MMSA2-20R
2	20	L	BK	16	35	40	42.52	35	22.09	16.26	12.5	20	9	24.54	5	2.3	M5	7	1.83	1.76	0.06	0.16	0.12		MMSB2-20R
2.5	20	R	BK	18	42	50	53.2	45	28.63	21.6	16	26	11	30.89	6	2.8	M6	8	3.52	3.44	0.07	0.17	0.24		MMSA2.5-20L
2.5	20	R	BK	20	42	50	53.2	45	28.63	21.6	16	26	11	30.89	6	2.8	M6	8	3.52	3.44	0.07	0.17	0.23		MMSB2.5-20L
2.5	20	L	BK	18	42	50	53.2	45	28.63	21.6	16	26	11	30.89	6	2.8	M6	8	3.52	3.44	0.07	0.17	0.24		MMSA2.5-20R
2.5	20	L	BK	20	42	50	53.2	45	28.63	21.6	16	26	11	30.89	6	2.8	M6	8	3.52	3.44	0.07	0.17	0.23		MMSB2.5-20R
3	20	R	BK	20	52	60	63.99	50	30.78	21.99	16	27	14	34.4	6	2.8	M6	8	6.32	6.23	0.08	0.18	0.40		MMSA3-20L
3	20	R	BK	22	52	60	63.99	50	30.78	21.99	16	27	14	34.4	6	2.8	M6	8	6.32	6.23	0.08	0.18	0.39		MMSB3-20L
3	20	L	BK	20	52	60	63.99	50	30.78	21.99	16	27	14	34.4	6	2.8	M6	8	6.32	6.23	0.08	0.18	0.40		MMSA3-20R
3	20	L	BK	22	52	60	63.99	50	30.78	21.99	16	27	14	34.4	6	2.8	M6	8	6.32	6.23	0.08	0.18	0.39		MMSB3-20R
3.5	20	R	B4	25	50	70	74.53	55	32.45	22.26	14	29	16	42.75	8	3.3	M8	8	9.90	9.86	0.10	0.25	0.46		MMSA3.5-20L
3.5	20	R	B4	28	50	70	74.53	55	32.45	22.26	14	29	16	42.75	8	3.3	M8	8	9.90	9.86	0.10	0.25	0.43		MMSB3.5-20L
3.5	20	L	B4	25	50	70	74.53	55	32.45	22.26	14	29	16	42.75	8	3.3	M8	8	9.90	9.86	0.10	0.25	0.46		MMSA3.5-20R
3.5	20	L	B4	28	50	70	74.53	55	32.45	22.26	14	29	16	42.75	8	3.3	M8	8	9.90	9.86	0.10	0.25	0.43		MMSB3.5-20R
4	20	R	B4	28	55	80	84.99	65	39.13	27.5	17	35	18	49.08	8	3.3	M8	9	14.6	14.7	0.12	0.27	0.70		MMSA4-20L
4	20	R	B4	30	55	80	84.99	65	39.13	27.5	17	35	18	49.08	8	3.3	M8	9	14.6	14.7	0.12	0.27	0.68		MMSB4-20L
4	20	L	B4	28	55	80	84.99	65	39.13	27.5	17	35	18	49.08	8	3.3	M8	9	14.6	14.7	0.12	0.27	0.70		MMSA4-20R
4	20	L	B4	30	55	80	84.99	65	39.13	27.5	17	35	18	49.08	8	3.3	M8	9	14.6	14.7	0.12	0.27	0.68		MMSB4-20R
5	20	R	B4	30	70	100	106.25	75	42.99	28.13	17	38	23	60.95	8	3.3	M8	9	29.0	29.4	0.14	0.34	1.32		MMSA5-20L
5	20	R	B4	35	70	100	106.25	75	42.99	28.13	17	38	23	60.95	10	3.3	M8	9	29.0	29.4	0.14	0.34	1.25		MMSB5-20L
5	20	L	B4	30	70	100	106.25	75	42.99	28.13	17	38	23	60.95	8	3.3	M8	9	29.0	29.4	0.14	0.34	1.32		MMSA5-20R
5	20	L	B4	35	70	100	106.25	75	42.99	28.13	17	38	23	60.95	10	3.3	M8	9	29.0	29.4	0.14	0.34	1.25		MMSB5-20R
6	20	R	B4	40	80	120	127.59	90	51.13	33.8	20	45	27	73.63	12	3.3	M8	10	48.4	50.6	0.16	0.36	2.11		MMSA6-20L
6	20	R	B4	45	80	120	127.59	90	51.13	33.8	20	45	27	73.63	14	3.8	M8	10	48.4	50.6	0.16	0.36	1.99		MMSB6-20L
6	20	L	B4	40	80	120	127.59	90	51.13	33.8	20	45	27	73.63	12	3.3	M8	10	48.4	50.6	0.16	0.36	2.11		MMSA6-20R
6	20	L	B4	45	80	120	127.59	90	51.13	33.8	20	45	27	73.63	14	3.8	M8	10	48.4	50.6	0.16	0.36	1.99		MMSB6-20R
8	20	R	B7	80		160		100	45	29.16		40	35	101			6-M10	110	111	119	0.20	0.45	3.98		MMSA8-20L
8	20	L	B7	80		160		100	45	29.16		40	35	101			6-M10	110	111	119	0.20	0.45	3.98		MMSA8-20R
10	20	R	B7	100		200		125	58	36.48		50	45	122.72			6-M10	130	169	188	0.25	0.50	7.88		MMSA10-20L
10	20	L	B7	100		200		125	58	36.48		50	45	122.72			6-M10	130	169	188	0.25	0.50	7.88		MMSA10-20R

Product Precautions

[Caution on Product Characteristics]	①A sets of miter gears must be identical in module and number of teeth, but opposite in spiral hands.
	②The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see precaution for more details.
	③Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips.
	④These gears produce axial thrust forces. See precaution for more details.
	⑤Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the effects of heat treatment.
	⑥For products with a tapped hole, a set screw is included as an accessory.

[Caution on Secondary Operations]	①These products which are hardened by carburizing allow no secondary machining. However, for B7 type gear, the area surrounded with -- - - -- line (in the illustration) is masked during the carburization process and can be modified. Care should be exercised since the hardness is high (approx. HRC40, maximum).

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