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Kaydon slewing bearings

XR series

XR series cross roller bearings provide a wide variety of solutions, including a high degree of stiffness and low rotational torque within a minimal envelope. XR series bearings are ideal when a four-point contact ball bearing does not meet operating performance requirements for torque and stiffness.

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Specifications

No gear
Internal gear
External gear
Notes & related items

Design features
The internal configuration consists of cylindrical rollers in a v-shaped groove in each ring. The rollers are oriented with alternating axes of rotation. Positioned in this manner, the bearing accepts all combinations of radial, thrust, and moment loads. Rotational torque is less than a four-point contact ball design because each roller only transmits load in a single direction, and the greater contact area and geometry of a roller versus a ball provides a higher degree of stiffness and rigidity.

A roller of approximately the same size as a ball has greater load-carrying ability. However, because not all the rollers are oriented in one direction, their thrust and moment load capacity is less than that of a four-point ball bearing.

Gear teeth or other drive mechanisms can be provided on the inner or outer support ring, and your choice of hole pattern can be added for bearing retention.

Availability
Kaydon XR series cross roller slewing ring bearings are custom manufactured to fit the design and specification.

Applications
XR series bearing solutions have been used successfully in applications requiring extra stiffness with a low torque requirement including:

Radar
Military turrets
Machine tools
Tunnel boring machines

See glossary of symbols

No gear
Kaydon part number	Load chart	Outline dimensions & weight								Mounting holes						Gear data α = 20°						Max gear tooth load F_z (lbs)	Dynamic capacities 1 million revolutions L₁₀ life
		D_o (in)	d_i (in)	H (in)	H_o (in)	H_i (in)	D_r (in)	d_r (in)	G approx. (lbs)	Outer ring			Inner ring			Gear data α = 20°							Dynamic capacities 1 million revolutions L₁₀ life
		D_o (in)	d_i (in)	H (in)	H_o (in)	H_i (in)	D_r (in)	d_r (in)	G approx. (lbs)	L_o (in)	n_o	B_o (in)	L_i (in)	n_i	B_i (in)	Tooth form	D₂ (in)	P_d or (m)	z₂	x₂	b₂ (in)		Radial (lbs)	Thrust (lbs)	Moment (ft-lbs)
†16318001		11.811	5.512	1.417	1.181	1.181	-	-	30	10.630	6	M16x2	6.693	6	M16x2	-	-	-	-	-	-	-	19,150	22,340	7,530
†16319001		15.886	9.055	2.165	1.772	1.850	-	-	65	14.094	24	0.512	10.197	24	0.512	-	-	-	-	-	-	-	36,850	42,830	20,140
†16320001		27.362	18.779	3.031	2.520	2.244	27.283	18.897	185	25.197	28	0.709	20.000	28	0.709	-	-	-	-	-	-	-	64,560	73,730	65,660
†16321001		35.312	26.625	2.953	2.863	2.863	35.251	26.750	325	34.000	24	1/2-13	29.000	24	0.590	-	-	-	-	-	-	-	81,310	91,980	116,170
†16322001		46.250	34.250	4.250	3.880	3.880	-	34.380	765	44.000	28	1-8	36.250	28	1.063	-	-	-	-	-	-	-	235,420	270,010	425,900
†16323001		56.380	46.770	3.820	3.470	3.430	56.295	46.850	710	40.000	36	0.813	33.875	36	3/4-16	-	-	-	-	-	-	-	209,680	237,380	482,960
†16324001		85.000	74.000	3.750	3.250	3.250	84.880	74.120	1,190	83.000	42	0.938	76.000	42	0.938	-	-	-	-	-	-	-	267,330	300,410	956,430
†16325001		95.000	82.000	4.000	3.500	3.500	94.875	82.063	1,660	93.000	48	1.063	85.000	48	1.063	-	-	-	-	-	-	-	362,100	407,250	1,450,300
†16326001		131.890	112.205	7.874	6.496	7.087	131.250	120.866	6,500	127.559	40	M36x3	116.535	40	1.496	-	-	-	-	-	-	-	762,050	858,130	4,185,500
†16327001		158.661	140.945	8.819	6.654	6.654	-	-	6,400	155.315	92	1.654	144.291	92	1.654	-	-	-	-	-	-	-	723,870	812,130	4,879,900

See glossary of symbols

Internal gear
Kaydon part number	Load chart	Outline dimensions & weight								Mounting holes						Gear data α = 20°						Max gear tooth load F_z (lbs)	Dynamic capacities 1 million revolutions L₁₀ life
		D_o (in)	d_i (in)	H (in)	H_o (in)	H_i (in)	D_r (in)	d_r (in)	G approx. (lbs)	Outer ring			Inner ring			Gear data α = 20°							Dynamic capacities 1 million revolutions L₁₀ life
		D_o (in)	d_i (in)	H (in)	H_o (in)	H_i (in)	D_r (in)	d_r (in)	G approx. (lbs)	L_o (in)	n_o	B_o (in)	L_i (in)	n_i	B_i (in)	Tooth form	D₂ (in)	P_d or (m)	z₂	x₂	b₂ (in)		Radial (lbs)	Thrust (lbs)	Moment (ft-lbs)
†16328001		26.700	18.667	2.500	2.000	2.000	-	-	130	24.500	18	1/2-13	20.500	18	1/2-13	FD	19.000	6	114	0	2.000	6,345	64,620	73,810	65,430
†16329001		36.000	24.160	3.880	3.380	3.380	-	-	465	33.250	24	0.813	27.250	30	3/4-10	SD	24.800	2.5	62	0	3.380	27,300	157,900	181,900	213,180
†16330001		41.500	30.320	4.190	3.370	4.000	-	32.360	510	40.000	36	0.807	33.500	36	3/4-16	FD	30.800	2.5	77	-.400	3.500	27,600	220,820	254,250	362,220
†16331001		41.970	30.828	3.350	2.560	2.950	41.929	-	400	39.961	24	M20x2.5	34.646	24	M20x2.5	FD	31.102	(10)	79	-.625	2.950	22,820	125,790	142,740	211,160
†16332001		54.740	44.400	4.500	3.750	4.130	-	46.380	500	53.000	36	0.922	48.000	36	7/8-14	FD	45.200	2.5	113	0	3.750	28,600	205,410	232,690	460,450
†16333001		78.819	62.913	5.906	4.921	4.921	-	65.157	2,050	76.575	48	1.181	67.520	48	1.181	FD	63.307	(12)	134	-.500	4.528	40,350	406,070	459,660	1,315,740
†16334001		114.000	95.000	6.000	5.500	5.500	-	97.500	4,250	111.000	48	1.063	100.000	48	1-8	FD	96.000	2	192	0	5.000	54,550	500,930	563,230	2,389,570
†16335001		121.496	97.717	6.772	6.299	6.299	-	-	6,080	117.795	72	1.535	105.512	72	1.535	FD	98.268	(24)	104	-.708	6.299	134,270	755,820	854,030	3,797,780
†16336001		142.000	123.200	6.000	5.500	5.500	-	-	5,370	139.000	72	1.063	128.000	72	1.063	SD	124.000	2	248	0	5.500	50,440	675,310	758,460	4,057,130

See glossary of symbols

External gear
Kaydon part number	Load chart	Outline dimensions & weight								Mounting holes						Gear data α = 20°						Max gear tooth load F_z (lbs)	Dynamic capacities 1 million revolutions L₁₀ life
		D_o (in)	d_i (in)	H (in)	H_o (in)	H_i (in)	D_r (in)	d_r (in)	G approx. (lbs)	Outer ring			Inner ring			Gear data α = 20°							Dynamic capacities 1 million revolutions L₁₀ life
		D_o (in)	d_i (in)	H (in)	H_o (in)	H_i (in)	D_r (in)	d_r (in)	G approx. (lbs)	L_o (in)	n_o	B_o (in)	L_i (in)	n_i	B_i (in)	Tooth form	D₂ (in)	P_d or (m)	z₂	x₂	b₂ (in)		Radial (lbs)	Thrust (lbs)	Moment (ft-lbs)
†16337001		16.000	9.190	2.170	1.770	1.850	14.880	9.250	55	14.094	24	0.562	10.197	24	0.562	FD	15.600	5	78	0	1.460	4,320	24,130	27,780	13,190
†16338001		23.333	13.750	2.750	2.500	2.500	-	-	175	20.875	12	0.688	15.375	12	0.688	FD	23.000	6	138	0	2.500	7,430	85,170	99,260	69,470
†16339001		27.362	18.780	3.030	2.520	2.240	26.380	18.900	180	25.197	18	0.688	20.000	18	0.688	FD	26.969	(5)	137	0	1.650	5,725	64,560	73,730	65,660
†16340001		33.627	26.535	2.205	1.752	1.752	-	-	140	30.906	36	M12x1.75	27.480	40	0.551	FD	33.071	(8)	105	0	1.752	9,130	58,790	66,360	77,600
†16341001		36.333	24.500	4.690	4.310	3.880	35.500	24.625	580	33.625	24	0.813	26.125	24	0.813	FD	36.000	6	216	0	4.000	12,700	204,020	236,880	274,290
†16340001		45.050	34.180	3.930	3.360	3.470	42.840	34.250	470	41.338	24	0.866	35.826	24	0.866	FD	43.701	(10)	111	+.713	2.580	15,490	128,480	145,650	223,060
†16343001		51.040	40.000	4.000	3.500	3.500	-	-	680	48.200	36	0.813	41.800	36	0.813	SD	50.400	2.5	126	0	3.500	24,380	195,710	222,290	396,330
†16344001		63.150	47.480	5.118	4.409	4.409	61.063	47.559	1,420	58.819	36	1.023	50.394	36	1.023	FD	61.811	(10)	157	+.750	3.346	20,640	350,400	399,710	861,070
†16345001		70.510	53.540	5.040	4.330	4.330	-	-	1,460	65.354	42	1.063	55.906	42	1.063	FD	68.346	(14)	124	+1.150	4.330	36,690	293,690	332,590	801,340
†16346001		85.866	75.250	3.300	2.800	2.800	-	-	920	82.750	48	0.813	77.250	48	0.813	SD	85.333	3	256	0	2.800	18,280	190,740	213,890	686,710
†16347001		100.667	84.000	6.500	6.500	4.000	98.750	84.250	3,240	95.000	48	1-8	87.000	48	1.063	FD	100.000	3	300	0	6.000	32,030	376,230	422,960	1,557,670
†16348001		159.843	141.732	6.142	5.748	5.748	-	-	5,480	154.528	100	1.299	144.685	100	1.299	FD	158.110	(16)	251	+.500	5.748	67,650	724,030	812,320	4,874,640
†16393001		209.843	188.583	7.047	6.417	6.024	206.299	188.858	9,750	202.362	100	1.299	191.339	100	1.299	FD	206.929	(18)	292	+1.150	6.102	81,360	1,005,010	1,126,290	8,903,140

Notes
Damage to equipment and danger to human life can result from failure to heed the recommendations in the text identified by the warning symbol in Kaydon Catalog 390 where further details and additional considerations can be found.

Capacities are dynamic and based on an L₁₀ life of 1 million revolutions per ABMA Std 11-1990. Values listed do not apply simultaneously. Ring cross section and bolted joint configuration used may result in lower bearing capacity ratings.

† Contact Kaydon for a 3D model.

Related downloads
Catalog 390: XR series (Adobe PDF)
Catalog 390: all pages (Adobe PDF)

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