SF Series Self-lubricating Bushings

QY813

The SF series self-lubricating bushings have two structural forms: the oil-free lubrication bearing SF-1 series and the boundary lubrication self-lubricating bearing SF-2 series.

SF-1 Oilless Bearings metal composite materials to high-quality low-carbon steel substrate, sintered porous spherical copper powder layer, the surface rolled to the PTFE-based material as a wear-resistant lubricating the bearing layer, this material has excellent mechanical load carrying capacity intermediate copper layer can not only timely transfer of heat generated in the bearing during operation, but also improves the bonding strength of the plastic layer and the substrate. PTFE designed for completely dry friction state, and according to lubrication, friction coefficient and durability requirements to develop a variety of materials. Terios metal of PTFE composites under external lubrication or non-lubricated, can provide the best performance in the widest range of load, speed and temperature range.

SF-2 type material is POM plastic filled PTFE modified surface layer of the three-tier self-lubricating composite material, which is a benign boundary lubrication material, and therefore particularly suitable for high load low speed rotational movement, the rocking motion and frequently open and close under load and difficult to form hydrodynamic lubrication of bearings, thrust washer only, slider, tees and other friction parts. SF-2 can fully utilize trace grease lubrication under boundary lubrication conditions without refueling for long-term maintenance. Completely oil-free condition, SF-2 friction properties and allows the PV value is low, it is often in rolling out the storage pit plastic surface, coated with lithium grease or silicone grease, etc. during assembly.

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Type Tech Data		SF-1X	SF-1B	SF-1S	SF-1W	SF-1T	SF-1P	SF-1D	SF-2X	SF-2Y
Type Tech Data
Material		Steel+bronze powder+PTFE	Backing+bronze powder+PTFE	Stainless steel+bronze powder+PTFE	Steel+bronze powder+PTFE	Steel+bronze powder+PTFE	Steel+bronze powder+PTFE	Steel+bronze powder+PTFE	Steel+bronze powder+POM	Steel+bronze powder+POM
Friction Coefficient μ	Dry	0.08～0.20	0.08～0.20	0.08～0.20	0.08～0.20	0.08～0.20	0.08～0.20	0.08～0.20
Friction Coefficient μ	Lubrication	0.02～0.07	0.02～0.07	0.02～0.07	0.02～0.07	0.01～0.05	0.02～0.07	0.02～0.07	0.05～0.25	0.05～0.25
Max. Load	Static	250N/mm²	250N/mm²	250N/mm²	250N/mm²	250N/mm²	250N/mm²	250N/mm²	250N/mm²	250N/mm²
	Dynamic	140N/mm²	140N/mm²	140N/mm²	140N/mm²	140N/mm²	140N/mm²	140N/mm²	140N/mm²	140N/mm²
	Swing	60N/mm²	60N/mm²	60N/mm²	60N/mm²	60N/mm²	60N/mm²	60N/mm²	70N/mm²	70N/mm²
Max Speed	Dry	2.5m/s	2.5m/s	2.5m/s	2.5m/s	5m/s	2.5m/s	2.5m/s
Max Speed	Lubrication	5m/s	5m/s	5m/s	5m/s	10m/s	5m/s	5m/s	2.5m/s	2.5m/s
Max PV	Dry	3.6N/mm²·m/s	4.3N/mm²·m/s	3.6N/mm²·m/s	3.6N/mm²·m/s	4.3N/mm²·m/s	3.6N/mm²·m/s	3.8N/mm²·m/s
Max PV	Lubrication	50N/mm²·m/s	50N/mm²·m/s	50N/mm²·m/s	50N/mm²·m/s	60N/mm²·m/s	50N/mm²·m/s	50N/mm²·m/s	3N/mm²·m/s	3N/mm²·m/s
Working Temperature °C		-200～280	-200～280	-200～280	-200～280	-200～280	-200～280	-200～280	-40～130	-40～130
Thermal Conductivity		40 W/m•K	80 W/m•K	40 W/m•K	40 W/m•K	40 W/m•K	40 W/m•K	40 W/m•K	40 W/m•K	40 W/m•K
Linear Expansion Coefficient		11✕10^-6/k	17.5✕10^-6/k	16✕10^-6/k	11✕10^-6/k	11✕10^-6/k	11✕10^-6/k	11✕10^-6/k	11✕10^-6/k	11✕10^-6/k
Applications		General use, cost-effective	Bronze palte, good security	Stainless steel, can be anti-corrosion	Lead-free for food machinery	Pump bearings	Shock absorber bearings	SF-1P upgrade	Easy oil, general use	Lead-free for food machinery

SF-1 Oil-Free Lubrication Bearing Parameters

Shaft Ds (f7)		Housing D_H(H7 )	OD tolerance		After fixed D_i,a	Wall thick-ness	f₁	f₂	L⁰_-0.40 (d≤φ30 L -0.3， d＞φ30 L -0.4)

									6	8	10	12	15	20	25	30	40	50
6	-0.013	8 ^+0.015	8	+0.055	5.990	0.980 1.005	0.6	0.3	0606	0608	0610
	-0.028			+0.025	6.055
8	-0.013	10^+0.015	10	+0.055	7.990				0806	0808	0810	0812	0815
	-0.028			+0.025	8.055
10	-0.016	12^+0.018	12	+0.065	9.990				1006	1008	1010	1012	1015	1020
	-0.034			+0.030	10.058
12	-0.016	14^+0.018	14	+0.065	11.990				1206	1208	1210	1212	1215	1220	1225
	-0.034			+0.030	12.058
13	-0.016	15^+0.018	15	+0.065	12.990						1310	1312	1315	1320	1325
	-0.034			+0.030	13.058
14	-0.016	16^+0.018	16	0.065	13.990						1410	1412	1415	1420	1425
	-0.034			+0.030	14.058
15	-0.016	17^+0.018	17	0.065	14.990						1510	1512	1515	1520	1525
	-0.034			+0.030	15.058
16	-0.016	18^+0.018	18	+0.065	15.990						1610	1612	1615	1620	1625
	-0.034			+0.030	16.058
17	0.016	19^+0.021	19	+0.075	16.990						1710	1712	1715	1720	1725
	-0.034			+0.035	17.061
18	-0.016	20^+0.021	20	+0.075	17.990						1810	1812	1815	1820	1825
	-0.034			+0.035	18.061
20	-0.020	23^+0.021	23	+0.075	19.990	1.475 1.505	0.6	0.4			2010	2012	2015	2020	2025	2030
	-0.041			+0.035	20.071
22	-0.020	25^+0.021	25	+0.075	21.990						2210	2212	2215	2220	2225	2230
	-0.041			+0.035	22.071
24	-0.020	27^+0.021	27	+0.075	23.990						2410	2412	2415	2420	2425	2430
	-0.041			+0.035	24.071
25	-0.020	28^+0.021	28	+0.075	24.990						2510	2512	2515	2520	2525	2530	2540	2550
	-0.041			+0.035	25.071
28	-0.020	32^+0.025	32	+0.085	27.990	1.970 2.005	1.2	0.4				2812	2815	2820	2825	2830	2840	2850
	-0.041			+0.045	28.085
30	-0.020	34^+0.025	34	+0.085	29.990							3012	3015	3020	3025	3030	3040	3050
	-0.041			+0.045	30.285
32	-0.025	36^+0.025	36	+0.085	31.990							3212	3215	3220	3225	3230	3240	3250
	-0.050			+0.045	32.085
35	-0.025	39^+0.025	39	+0.085	34.990							3512	3515	3520	3525	3530	3540	3550
	-0.050			+0.045	35.085
38	-0.025	42^+0.025	42	+0.085	37.990							3812	3815	3820	3825	3830	3840	3850
	-0.050			+0.045	38.085
40	-0.025	44^+0.025	44	+0.085	39.990							4012	4015	4020	4025	4030	4040	4050
	-0.050			+0.045	40.085

SF-2 Boundary Bearings Parameters

d	D	Shaft h8	Housing H7	Wall thicknes		Oil hold h	f₁	f₂	L⁰_-0.40
d	D	Shaft h8	Housing H7	min	Max	Oil hold h	f₁	f₂	10	15	20	25	30	35	40	45	50	60
10	12	10_-0.022	12^+0.018	0.955	0.980	4	0.6	0.3	1010	1015	1020
12	14	12_-0.027	14^+0.018						1210	1215	1220
14	16	14_-0.027	16^+0.018							1415	1420
15	17	15_-0.027	17^+0.018							1515	1520	1525
16	18	16_-0.027	18^+0.018							1615	1620	1625
18	20	18_-0.027	20^+0.021							1815	1820	1825
20	23	20_-0.033	23^+0.021	1.445	1.475		0.6	0.4		2015	2020	2025	2030
22	25	22_-0.033	25^+0.021							2215	2220	2225	2230
25	28	25_-0.033	28^+0.021			6				2515	2520	2525	2530
28	32	28_-0.033	32^+0.025	1.935	1.970		1.2	0.4			2820	2825	2830
30	34	30_-0.033	34^+0.025								3020	3025	3030	3035	3040
35	39	35_-0.039	39^+0.025								3520	3525	3530	3535	3540
40	44	40_-0.039	44^+0.025			8					4020	4025	4030	4035	4040	4045	4050
45	50	45_-0.039	50^+0.025	2.415	2.460		1.8	0.6			4520	4525	4530	4535	4540	4545	4550
50	55	50_-0.039	55^+0.030										5030	5035	5040	5045	5050	5060
55	60	55_-0.046	60^+0.030										5530	5535	5540	5545	5550	5560
60	65	60_-0.046	65^+0.030										6030	6035	6040	6045	6050	6060

d	D	Shaft h8	Housing H7	Wall thicknes		Oil hold h	f₁	f₂	L⁰_-0.40
d	D	Shaft h8	Housing H7	min	Max	Oil hold h	f₁	f₂	10	15	20	25	30	35	40	45	50	60
10	12	10_-0.022	12^+0.018	0.955	0.980	4	0.6	0.3	1010	1015	1020
12	14	12_-0.027	14^+0.018						1210	1215	1220
14	16	14_-0.027	16^+0.018							1415	1420
15	17	15_-0.027	17^+0.018							1515	1520	1525
16	18	16_-0.027	18^+0.018							1615	1620	1625
18	20	18_-0.027	20^+0.021							1815	1820	1825
20	23	20_-0.033	23^+0.021	1.445	1.475		0.6	0.4		2015	2020	2025	2030
22	25	22_-0.033	25^+0.021							2215	2220	2225	2230
25	28	25_-0.033	28^+0.021			6				2515	2520	2525	2530
28	32	28_-0.033	32^+0.025	1.935	1.970		1.2	0.4			2820	2825	2830
30	34	30_-0.033	34^+0.025								3020	3025	3030	3035	3040
35	39	35_-0.039	39^+0.025								3520	3525	3530	3535	3540
40	44	40_-0.039	44^+0.025			8					4020	4025	4030	4035	4040	4045	4050
45	50	45_-0.039	50^+0.025	2.415	2.460		1.8	0.6			4520	4525	4530	4535	4540	4545	4550
50	55	50_-0.039	55^+0.030										5030	5035	5040	5045	5050	5060
55	60	55_-0.046	60^+0.030										5530	5535	5540	5545	5550	5560
60	65	60_-0.046	65^+0.030										6030	6035	6040	6045	6050	6060

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