Heavy Duty (Imperial) – XWSM Series

The Heavy Duty Series of Spirolox® Retaining Rings is designed for the toughest circlip and retaining ring jobs. WSM series retaining rings use standard industry groove dimensions and are interchangeable with many stamped retaining rings.

Need Assistance?
Contact our Engineering team now +44 (0)1435 866011 or

Request a Sample

Request a CAD Model

Product Information

The Heavy Duty Series of Spirolox^® Retaining Rings is designed for the toughest circlip and retaining ring jobs. WSM series retaining rings use standard industry groove dimensions and are interchangeable with many stamped retaining rings. This series should be specified for thrust loads that demand deep groove, heavy section capacity.

Interchangeable with standard circlip sizes

Materials: Carbon Steel / 302 & 316 Stainless Steel.
Alternative materials available on request.

Dimensions: Inches
(in)* No removal notch¹ Based on groove materials yield strength of 45,000 psi and safety factor of 2.² Based on safety factor of 3.Add suffix -S02 or -S16 for stainless steel

Part Number	Shaft Diameter	Ring Inside Diameter		Ring Radial Wall		Ring Thickness		Groove Diameter		Groove Width		Groove Yield¹ (Lb)	Ring Shear² (Lb)
XWSM-25*	0.250	0.228	+0.000/-0.010	0.020	+0.003/-0.005	0.025	±0.002	0.230	±0.002	0.029	+0.003/-0.000	177	961
XWSM-31*	0.312	0.287		0.025		0.025		0.290		0.029		243	1200
XWSM-37*	0.375	0.349		0.030		0.025		0.352		0.029		305	1442
XWSM-43	0.437	0.409	+0.000/-0.012	0.035		0.025		0.412		0.029		386	1680
XWSM-46	0.469	0.439	+0.000/-0.013	0.045		0.025		0.443		0.029		430	1880
XWSM-50	0.500	0.464		0.050		0.035		0.468		0.039		570	2530
XWSM-55	0.551	0.514		0.050		0.035		0.519		0.039		620	2790
XWSM-56	0.562	0.525		0.050		0.035		0.530		0.039		640	2840
XWSM-59	0.594	0.554		0.050		0.035		0.559	±0.003	0.039		760	3000
XWSM-62	0.625	0.583		0.055		0.035		0.588		0.039		840	3160
XWSM-66	0.669	0.623		0.055		0.035		0.629		0.039		950	3380
XWSM-68	0.688	0.641		0.065		0.042		0.646		0.046		1020	4180
XWSM-75	0.750	0.698		0.065		0.042		0.704		0.046		1220	4550
XWSM-78	0.781	0.727		0.065		0.042		0.733		0.046		1330	4740
XWSM-81	0.812	0.756		0.065		0.042		0.762		0.046		1440	4930
XWSM-87	0.875	0.814		0.075		0.042		0.821		0.046		1670	5310
XWSM-93	0.938	0.875		0.075		0.042		0.882		0.046		1860	5690
XWSM-98	0.984	0.919		0.085		0.042		0.926		0.046		2020	5970
XWSM-100	1.000	0.932		0.085		0.042		0.940		0.046		2120	6070
XWSM-102	1.023	0.953		0.085		0.042		0.961		0.046		2240	6210
XWSM-106	1.062	0.986		0.103		0.050		0.998	±0.004	0.056	+0.004/-0.000	2400	7010
XWSM-112	1.125	1.047		0.103		0.050		1.059		0.056		2620	7420
XWSM-118	1.188	1.105		0.103		0.050		1.118		0.056		2940	7840
XWSM-125	1.250	1.163		0.103		0.050		1.176		0.056		3270	8250
XWSM-131	1.312	1.218		0.118		0.050		1.232		0.056		3710	8660
XWSM-137	1.375	1.277		0.118		0.050		1.291		0.056		4080	9070
XWSM-143	1.438	1.336		0.118		0.050		1.350		0.056		4470	9490
XWSM-150	1.500	1.385		0.118		0.050		1.406		0.056		4980	9900
XWSM-156	1.562	1.453	+0.000/-0.020	0.128		0.062	±0.003	1.468	±0.005	0.068		5190	12780
XWSM-162	1.625	1.513		0.128		0.062		1.529		0.068		5510	13290
XWSM-168	1.687	1.573		0.128		0.062		1.589		0.068		5840	13800
XWSM-175	1.750	1.633		0.128		0.062		1.650		0.068		6190	14320
XWSM-177	1.771	1.651		0.128		0.062		1.669		0.068		6380	14490
XWSM-181	1.812	1.690		0.128		0.062		1.708		0.068		6660	14820
XWSM-187	1.875	1.751		0.158		0.062		1.769		0.068		7020	15340
XWSM-196	1.969	1.838		0.158		0.062		1.857		0.068		7790	16110
XWSM-200	2.000	1.867		0.158		0.062		1.886		0.068		8060	16360
XWSM-206	2.062	1.932	+0.000/-0.025	0.168	+0.004/-0.006	0.078		1.946	±0.006	0.086	+0.005/-0.000	8450	21220
XWSM-212	2.125	1.989		0.168		0.078		2.003		0.086		9160	21870
XWSM-215	2.156	2.018		0.168		0.078		2.032		0.086		9450	22190
XWSM-225	2.250	2.105		0.168		0.078		2.120		0.086		10340	23160
XWSM-231	2.312	2.163		0.168		0.078		2.178		0.086		10950	23800
XWSM-237	2.375	2.223		0.200		0.078		2.239		0.086		11420	24440
XWSM-243	2.437	2.283		0.200		0.078		2.299		0.086		11890	25080
XWSM-250	2.500	2.343		0.200		0.078		2.360		0.086		12370	25730
XWSM-255	2.559	2.402		0.200		0.078		2.419		0.086		12660	26340
XWSM-262	2.625	2.464		0.200		0.078		2.481		0.086		13360	27020
XWSM-268	2.687	2.523		0.200		0.078		2.541		0.086		13870	27660
XWSM-275	2.750	2.584	+0.000/-0.030	0.225		0.093		2.602		0.103		14390	32140
XWSM-287	2.875	2.702		0.225		0.093		2.721		0.103		15650	33600
XWSM-293	2.937	2.760		0.225		0.093		2.779		0.103		16400	34320
XWSM-300	3.000	2.818		0.225		0.093		2.838		0.103		17180	35060
XWSM-306	3.062	2.878		0.225		0.093		2.898		0.103		17750	35790
XWSM-312	3.125	2.936		0.225		0.093		2.957		0.103		18560	36520
XWSM-315	3.156	2.965		0.225		0.093		2.986		0.103		18960	36880
XWSM-325	3.250	3.054		0.225		0.093		3.076		0.103		19990	37980
XWSM-334	3.344	3.144		0.225		0.093		3.166		0.103		21040	39080
XWSM-343	3.437	3.234		0.225		0.093		3.257		0.103		21870	40170
XWSM-350	3.500	3.293	+0.000/-0.035	0.270		0.111		3.316		0.120		22760	48820
XWSM-354	3.543	3.333		0.270		0.111		3.357		0.120		23290	49420
XWSM-362	3.625	3.411		0.270		0.111		3.435		0.120		24340	50560
XWSM-368	3.687	3.469		0.270		0.111		3.493		0.120		25280	51430
XWSM-375	3.750	3.527		0.270		0.111		3.552		0.120		26240	52310
XWSM-387	3.875	3.647		0.270		0.111		3.673		0.120		27670	54050
XWSM-393	3.938	3.708		0.270		0.111		3.734		0.120		28390	54930
XWSM-400	4.000	3.765		0.270		0.111		3.792		0.120		29410	55800
XWSM-425	4.250	4.037	+0.000/-0.050	0.270		0.111		4.065		0.120		27940	59280
XWSM-437	4.375	4.161		0.270		0.111		4.190		0.120		28760	61030
XWSM-450	4.500	4.280		0.270		0.111		4.310		0.120		30220	62770
XWSM-475	4.750	4.518		0.270		0.111		4.550		0.120		36930	66260
XWSM-500	5.000	4.756		0.270		0.111		4.790		0.120		37110	69740
XWSM-525	5.250	4.995		0.350	+0.004/-0.008	0.127	±0.004	5.030	±0.007	0.139	+0.006/-0.000	40820	83790
XWSM-550	5.500	5.228		0.350		0.127		5.265		0.139		45880	87780
XWSM-575	5.750	5.466		0.350		0.127		5.505		0.139		49990	91770
XWSM-600	6.000	5.705		0.350		0.127		5.745		0.139		54290	95760
XWSM-625	6.250	5.938	+0.000/-0.060	0.418		0.156	±0.005	5.985	±0.008	0.174	+0.008/-0.000	58760	122520
XWSM-650	6.500	6.181		0.418		0.156		6.225		0.174		63410	127420
XWSM-675	6.750	6.410		0.418		0.156		6.465		0.174		68230	132330
XWSM-700	7.000	6.648		0.418		0.156		6.705		0.174		73230	137230
XWSM-725	7.250	6.891	+0.000/-0.070	0.418		0.156		6.942		0.174		78920	142130
XWSM-750	7.500	7.130		0.437		0.187		7.180		0.209		84820	176240
XWSM-775	7.750	7.368		0.437		0.187		7.420		0.209		90390	182120
XWSM-800	8.000	7.606		0.437		0.187		7.660		0.209		96130	187990
XWSM-825	8.250	7.845		0.437		0.187		7.900		0.209		102050	193870
XWSM-850	8.500	8.083		0.437		0.187		8.140		0.209		108150	199740
XWSM-875	8.750	8.324		0.437		0.187		8.383		0.209		113800	205620
XWSM-900	9.000	8.560		0.500	+0.005/-0.010	0.187		8.620		0.209		120870	211490
XWSM-925	9.250	8.798		0.500		0.187		8.860		0.209		127500	217370
XWSM-950	9.500	9.036		0.500		0.187		9.100		0.209		134300	223240
XWSM-975	9.750	9.275		0.500		0.187		9.338		0.209		141970	229120
XWSM-1000	10.000	9.508		0.500		0.187		9.575		0.209		150560	234990
XWSM-1025	10.250	9.745	+0.000/-0.090	0.500		0.187		9.814		0.209		157950	240870
XWSM-1050	10.500	9.984		0.500		0.187		10.054	±0.010	0.209		165510	246740
XWSM-1075	10.750	10.221		0.500		0.187		10.293		0.209		174010	252620
XWSM-1100	11.000	10.459		0.500		0.187		10.533		0.209		181950	258490
XWSM-1125	11.250	10.692		0.500		0.187		10.772		0.209		190060	264360
XWSM-1150	11.500	10.934		0.562		0.187		11.011		0.209		199160	270240
XWSM-1175	11.750	11.171		0.562		0.187		11.250		0.209		207640	276120
XWSM-1200	12.000	11.410		0.562		0.187		11.490		0.209		216300	281990
XWSM-1225	12.250	11.647		0.562		0.187		11.729		0.209		226000	287860
XWSM-1250	12.500	11.885		0.562		0.187		11.969		0.209		235030	293740
XWSM-1275	12.750	12.124	+0.000/-0.110	0.562		0.187		12.208	±0.012	0.209		244240	299610
XWSM-1300	13.000	12.361		0.662		0.187		12.448		0.209		253620	305490
XWSM-1325	13.250	12.598		0.662		0.187		12.687		0.209		264120	311360
XWSM-1350	13.500	12.837		0.662		0.187		12.927		0.209		273870	317240
XWSM-1375	13.750	13.074		0.662		0.187		13.166		0.209		283800	323110
XWSM-1400	14.000	13.311		0.662		0.187		13.405		0.209		294900	328990
XWSM-1425	14.250	13.548		0.662		0.187		13.644		0.209		305200	334860
XWSM-1450	14.500	13.787		0.750		0.187		13.884		0.209		315680	340740
XWSM-1475	14.750	14.024		0.750		0.187		14.123		0.209		327380	346610
XWSM-1500	15.000	14.262		0.750		0.187		14.363		0.209		338230	352490

With ISO9001: 2015 approval incorporating Design Status, our qualified engineering staff are able to offer a completely free of charge engineering service and are available to assist with part selection, custom design, application requirements, material selection and more.

Applications are discussed in-depth, first-off design data and drawings are submitted for approval to ensure our customers are provided with the correct design, first time. However, on those rare occasions when modifications are necessary, our no-tooling process and flexible manufacturing procedures means the production of prototypes is easily and economically achieved without onerous tooling charges and long lead times.

At TFC we realise that Quality runs through the entire business, not just our products. We have continually invested in the right people to provide the superior market knowledge and customer service.

Our supply chain partners, from manufacturers to logistics and information technology are carefully chosen to ÿt our commitment to quality