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PTFE & Plastic Bushings

PTFE Bushings

PTFE resin bushings are an excellent choice for performance applications involving high speeds and high temperatures. Bushings can be manufacutured to the right size both through mechancial machining and molding.

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Main Features

Superior wear resistance and dimensional stability

Excellent resistance to chemicals

Very low moisture absorption

Very high thermal stability

Superb flexural and torsional strength

Good dielectric properties

Abrasion resistant

Typical Applications

Gears, valve seats

Seals and sealing rings

Electrical parts, bushings, bearings

Plug connectors, wafers

Valve stems

Application Notes

Type	Straight	Bushing Material	PTFE	Maximum Allowable PV Value Range(N/mm2•m/s)	0.3 to 1.0
Maximum Allowable PV Value(N/mm2•m/s)	1	Maximum Allowable Load(N/mm2)	7	Maximum Allowable Velocity(m/s)	1.65
Mounting Hole Fits	H7	Operating Temperature Range(°C)	-200 - 200	Environment	Food

Material Selection

Virgin PTFE	PTFE + Carbon fibre	PTFE + Graphite + Carbon fibre
PTFE + MoS2	PTFE + Bronze	*Other materials available upon request

Size Specifications

Part Number			L									D		* Housing Dia.		I.D. after Press-Fit	* Shaft Diameter		Chamfer
Type	d (Tolerance before Press-fit)		L									D		Ref. Dim.	Tolerance (H7)	Tolerance (Ref. Value)	Ref. Dim.	Tolerance (g6)	a
Straight	3	+0.179 +0.129	3	5								6	+0.090 +0.040	6	+0.012 0	+0.120 +0.070	3	-0.002 -0.008	C0.3
	4	+0.179 +0.129	3	5	8							7	+0.090 +0.040	7	+0.015 0	+0.122 +0.072	4	-0.004 -0.012	C0.3
	5	+0.179 +0.129		5	8	10						8	+0.090 +0.040	8	+0.015 0	+0.122 +0.072	5	-0.004 -0.012	C0.3
	6	+0.182 +0.132		5	8	10						9	+0.090 +0.040	9	+0.015 0	+0.125 +0.075	6	-0.004 -0.012	C0.3
	8	+0.197 +0.147			8	10	12	15				12	+0.100 +0.050	12	+0.018 0	+0.131 +0.081	8	-0.005 -0.014	C0.5
	10	+0.210 +0.160			8	10	12	15				14	+0.100 +0.050	14	+0.018 0	+0.144 +0.094	10	-0.005 -0.014	C0.5
	12	+0.212 +0.162				10	12	15	20			16	+0.100 +0.050	16	+0.018 0	+0.146 +0.096	12	-0.006 -0.017	C0.5
	16	+0.239 +0.169					12	15	20	25		22	+0.100 +0.050	22	+0.021 0	+0.175 +0.105	16	-0.006 -0.017	C0.5
	20	+0.303 +0.183						15	20	25	30	26	+0.110 +0.060	26	+0.021 0	+0.229 +0.109	20	-0.007 -0.020	C0.8
[ ! ]Dimension tolerance is measured at +25°C. d tolerance is the value before press-fitted into housing. * Housing diameters and shaft diameters listed here are recommended dimensions.

L: Dimension Tolerance:

L≤8 (0/-0.20)

L≥10 (0 /-0.25)

L: Dimension Tolerance:

L≤8 (0/-0.20)

L≥10 (0 /-0.25)