SPIETH Locknuts
Series MSA - Metric

CAD models are available through the table below.

		d1 = M 20 x 1 : Locknut MSA 20 x 1 The allowable axial loads specified in the table are guideline values calculated with a safety margin of 1.6 — under static load, based on the minimum yield point,— under dynamic loads, based on the minimum fatigue strength.

Series MSA Locknuts with reduced contact surface and in some cases smaller outside diameters relative to the MSR series are particularly suited for mounting angular ball bearings and cylinder roller bearings of ISO diameter series 9.

MSA (d₁ x pitch) Click Part # for CAD	Dimensions in mm							Clamp Screws			Calculation factor A	Locknut-specific allowance B	Allowable axial load		Mass moment of inertia J
	d₂	d₃¹⁾	d4	d₅¹⁾	d₆	h	l	Sizes	n	T_s	Calculation factor A	Locknut-specific allowance B	dyn.	stat.	Mass moment of inertia J
	d₂	d₃¹⁾	d4	d₅¹⁾	d₆	h	l	SHCS	Qty	Nm	mm	N	kN	kN	kg cm²
MSA 20 x 1	35	4	27.5	3.2	31	17	5	M 3x12	5	2	1.281	3938	23	31	0.142
MSA 25 x 1.5	40	4	32.5	3.2	36	19	6.5	M 3x14	5	2	1.633	3859	35	49	0.265
MSA 30 x 1.5	45	5	37.5	3.2	41	19	6.5	M 3x14	5	2	1.921	3780	39	56	0.400
MSA 35 x 1.5	53	5	45.5	4.3	48	22	7	M 4x16	4	2.9	2.210	3666	47	66	0.904
MSA 40 x 1.5	58	5	50.5	4.3	54	22	7	M 4x16	4	2.9	2.500	3588	50	68	1.242
MSA 45 x 1.5	64	6	54	4.3	59	23	7	M 4x16	5	2.9	2.789	4388	58	78	1.888
MSA 50 x 1.5	69	6	59	4.3	64	24	8	M 4x16	6	2.9	3.079	5148	63	85	2.563
MSA 55 x 1.5	73	6	64	4.3	69	24	8	M 4x16	6	2.9	3.369	5031	59	79	3.001
MSA 60 x 1.5	78	6	69	4.3	74	24	8	M 4x16	6	2.9	3.655	4914	61	81	3.758
MSA 65 x 1.5	83	6	74	4.3	79	24	8	M 4x16	7	2.9	3.948	5597	94	124	4.611
MSA 70 x 1.5	93	8	83	5.3	88	27	9	M 5x20	6	6	4.238	7620	136	178	9.094
MSA 75 x 1.5	98	8	88	5.3	93	27	9	M 5x20	6	6	4.525	7430	138	183	10.866
MSA 80 x 2	103	8	93	5.3	98	28	10	M 5x20	6	6	4.873	7239	148	196	13.397
MSA 85 x 2	112	8	100	6.4	106	30	10	M 6x20	6	10	5.168	9990	172	228	21.260
MSA 90 x 2	117	8	105	6.4	111	30	10	M 6x20	6	10	5.453	9720	174	230	24.650
MSA 95 x 2	122	8	110	6.4	116	30	10	M 6x20	6	10	5.744	9450	176	232	28.384
MSA 100 x 2	130	8	118	6.4	123	32	11	M 6x22	6	10	6.033	9180	205	271	38.620
MSA 105 x 2	135	8	123	6.4	128	32	11	M 6x22	6	10	6.321	8910	207	274	43.852
MSA 110 x 2	140	8	128	6.4	133	32	11	M 6x22	6	10	6.616	8640	212	280	49.539
MSA 120 x 2	155	8	140	6.4	145	36	13	M 6x25	6	10	7.193	8100	308	408	89.148
MSA 130 x 3	165	8	153	6.4	155	36	13	M 6x25	6	10	7.895	7560	306	405	109.890
MSA 140 x 3	180	10	165	6.4	170	36	12	M 6x25	8	10	8.475	9360	359	476	160.150
MSA 150 x 3	190	10	175	6.4	180	36	12	M 6x25	8	10	9.050	8640	369	489	191.977
MSA 160 x 3	205	10	185	8.4	195	40	14	M 8x30	8	25	9.633	14520	417	552	300.080
MSA 170 x 3	215	10	195	8.4	205	40	14	M 8x30	8	25	10.213	13200	423	560	351.919
MSA 180 x 3	230	10	210	8.4	220	40	14	M 8x30	8	25	10.789	11880	489	648	475.748
MSA 190 x 3	240	10	224	8.4	230	40	14	M 8x30	8	25	11.362	10560	495	656	548.328
MSA 200 x 3	245	10	229	8.4	235	40	14	M 8x30	8	25	11.948	9240	436	578	542.596
1) In same quantity as clamp screws in Fig. 6 and Fig. 7. Specifications and dimensions are subject to change without notice. Spanner wrenches available upon request. Specials available upon request.