PTFE bushing sizes

The standard metric series of JBM-10 steel-backed PTFE composite bushings, to the ISO 3547 dimension system: cylindrical sleeves for Ø6–300 mm shafts, flanged bushings for Ø6–40 mm, thrust washers and strip. Each row gives the shaft and housing fits, the outside diameter before fitting, the bore after pressing and the resulting clearance, as published in Bushing MFG catalogue CAT.008.

A PTFE composite bushing is sized by the shaft it runs on: the bore equals the nominal shaft diameter, the outside diameter is 2 mm larger for walls of about 1 mm (Ø6–30), 3 mm for 1.5 mm walls, 4 mm for 2 mm walls and 5 mm for 2.5 mm walls. The bushing is made oversize and reaches its running bore only after it is pressed into an H7 housing, so the free bore is not the working bore.

Cylindrical JBM-10: Ø6–300 mm shaft, 48 bores, lengths from 6 to 100 mm; part code bore + length (2020 = Ø20 × 20)
Flanged JBM-10F: Ø6–40 mm shaft, designation JBM-1F + bore + length × 10
Thrust washers JBM-10WC: Ø8–60 mm shaft, W10–W62, with locating hole
Strip JBM-10SP: 500 × 150 mm in 1.0, 1.5, 2.0 and 2.5 mm wall
Fits: shaft f7, housing H7; bronze- (JBM-1B) and stainless-backed (JBM-1S) versions in the same sizes

JBM-10 cylindrical PTFE bushings (mm)

Standard metric sleeves for an f7 shaft in an H7 housing. The outside diameter is oversize before fitting; the bore closes to the installed value when the bushing is pressed in. Part code = bore + length: 2020 is Ø20 × 20 mm.

Shaft / bore d	Shaft f7	Housing D (H7)	OD before fitting	Installed bore	Clearance	Wall	Part codes (bore + length)	Quote
Ø6 PTFE sleeve	-0.010 / -0.022	8 +0.015 / 0	8 +0.055 / +0.025	6.055 / 5.990	0.077 / 0.000	1.005 / 0.980	0606 · 0608 · 0610	Quote
Ø8 PTFE sleeve	-0.013 / -0.028	10 +0.015 / 0	10 +0.055 / +0.025	8.055 / 7.990	0.083 / 0.003	1.005 / 0.980	0806 · 0808 · 0810 · 0812 · 0815	Quote
Ø10 PTFE sleeve	-0.013 / -0.028	12 +0.018 / 0	12 +0.065 / +0.030	10.058 / 9.990	0.086 / 0.003	1.005 / 0.980	1006 · 1008 · 1010 · 1012 · 1015 · 1020	Quote
Ø12 PTFE sleeve	-0.016 / -0.034	14 +0.018 / 0	14 +0.065 / +0.030	12.058 / 11.990	0.092 / 0.006	1.005 / 0.980	1206 · 1208 · 1210 · 1212 · 1215 · 1220 · 1225	Quote
Ø13 PTFE sleeve	-0.016 / -0.034	15 +0.018 / 0	15 +0.065 / +0.030	13.058 / 12.990	0.092 / 0.006	1.005 / 0.980	1310 · 1312 · 1315 · 1320 · 1325	Quote
Ø14 PTFE sleeve	-0.016 / -0.034	16 +0.018 / 0	16 +0.065 / +0.030	14.058 / 13.990	0.092 / 0.006	1.005 / 0.980	1410 · 1412 · 1415 · 1420 · 1425	Quote
Ø15 PTFE sleeve	-0.016 / -0.034	17 +0.018 / 0	17 +0.065 / +0.030	15.058 / 14.990	0.092 / 0.006	1.005 / 0.980	1510 · 1512 · 1515 · 1520 · 1525	Quote
Ø16 PTFE sleeve	-0.016 / -0.034	18 +0.018 / 0	18 +0.065 / +0.030	16.058 / 15.990	0.092 / 0.006	1.005 / 0.980	1610 · 1612 · 1615 · 1620 · 1625	Quote
Ø17 PTFE sleeve	-0.016 / -0.034	19 +0.021 / 0	19 +0.075 / +0.035	17.061 / 16.990	0.095 / 0.006	1.005 / 0.980	1710 · 1712 · 1715 · 1720 · 1725	Quote
Ø18 PTFE sleeve	-0.016 / -0.034	20 +0.021 / 0	20 +0.075 / +0.035	18.061 / 17.990	0.095 / 0.006	1.005 / 0.980	1810 · 1812 · 1815 · 1820 · 1825	Quote
Ø20 PTFE sleeve	-0.020 / -0.041	23 +0.021 / 0	23 +0.075 / +0.035	20.071 / 19.990	0.112 / 0.010	1.505 / 1.475	2010 · 2012 · 2015 · 2020 · 2025 · 2030	Quote
Ø22 PTFE sleeve	-0.020 / -0.041	25 +0.021 / 0	25 +0.075 / +0.035	22.071 / 21.990	0.112 / 0.010	1.505 / 1.475	2210 · 2212 · 2215 · 2220 · 2225 · 2230	Quote
Ø24 PTFE sleeve	-0.020 / -0.041	27 +0.021 / 0	27 +0.075 / +0.035	24.071 / 23.990	0.112 / 0.010	1.505 / 1.475	2410 · 2412 · 2415 · 2420 · 2425 · 2430	Quote
Ø25 PTFE sleeve	-0.020 / -0.041	28 +0.021 / 0	28 +0.075 / +0.035	25.071 / 24.990	0.112 / 0.010	1.505 / 1.475	2510 · 2512 · 2515 · 2520 · 2525 · 2530 · 2540 · 2550	Quote
Ø28 PTFE sleeve	-0.020 / -0.041	32 +0.025 / 0	32 +0.085 / +0.045	28.085 / 27.990	0.126 / 0.010	2.005 / 1.970	2812 · 2815 · 2820 · 2825 · 2830 · 2840 · 2850	Quote
Ø30 PTFE sleeve	-0.020 / -0.041	34 +0.025 / 0	34 +0.085 / +0.045	30.085 / 29.990	0.126 / 0.010	2.005 / 1.970	3012 · 3015 · 3020 · 3025 · 3030 · 3040 · 3050	Quote
Ø32 PTFE sleeve	-0.025 / -0.050	36 +0.025 / 0	36 +0.085 / +0.045	32.085 / 31.990	0.135 / 0.015	2.005 / 1.970	3212 · 3215 · 3220 · 3225 · 3230 · 3240 · 3250	Quote
Ø35 PTFE sleeve	-0.025 / -0.050	39 +0.025 / 0	39 +0.085 / +0.045	35.085 / 34.990	0.135 / 0.015	2.005 / 1.970	3512 · 3515 · 3520 · 3525 · 3530 · 3540 · 3550	Quote
Ø38 PTFE sleeve	-0.025 / -0.050	42 +0.025 / 0	42 +0.085 / +0.045	38.085 / 37.990	0.135 / 0.015	2.005 / 1.970	3812 · 3815 · 3820 · 3825 · 3830 · 3840 · 3850	Quote
Ø40 PTFE sleeve	-0.025 / -0.050	44 +0.025 / 0	44 +0.085 / +0.045	40.085 / 39.990	0.135 / 0.015	2.005 / 1.970	4012 · 4015 · 4020 · 4025 · 4030 · 4040 · 4050	Quote
Ø45 PTFE sleeve	-0.025 / -0.050	50 +0.025 / 0	50 +0.085 / +0.045	45.105 / 44.990	0.155 / 0.015	2.505 / 2.460	4520 · 4525 · 4530 · 4540 · 4550	Quote
Ø50 PTFE sleeve	-0.025 / -0.050	55 +0.030 / 0	55 +0.100 / +0.055	50.110 / 49.990	0.160 / 0.015	2.505 / 2.460	5020 · 5025 · 5030 · 5040 · 5050 · 5060	Quote
Ø55 PTFE sleeve	-0.030 / -0.060	60 +0.030 / 0	60 +0.100 / +0.055	55.110 / 54.990	0.170 / 0.020	2.505 / 2.460	5530 · 5540 · 5550 · 5560	Quote
Ø60 PTFE sleeve	-0.030 / -0.060	65 +0.030 / 0	65 +0.100 / +0.055	60.110 / 59.990	0.170 / 0.020	2.505 / 2.460	6030 · 6040 · 6050 · 6060 · 6070	Quote
Ø65 PTFE sleeve	-0.030 / -0.060	70 +0.030 / 0	70 +0.100 / +0.055	65.110 / 64.990	0.170 / 0.020	2.505 / 2.460	6530 · 6540 · 6550 · 6560 · 6570	Quote
Ø70 PTFE sleeve	-0.030 / -0.060	75 +0.030 / 0	75 +0.100 / +0.055	70.110 / 69.990	0.170 / 0.020	2.505 / 2.460	7030 · 7040 · 7050 · 7060 · 7070 · 7080	Quote
Ø75 PTFE sleeve	-0.030 / -0.060	80 +0.030 / 0	80 +0.100 / +0.055	75.110 / 74.990	0.170 / 0.020	2.505 / 2.460	7530 · 7540 · 7550 · 7560 · 7570 · 7580	Quote
Ø80 PTFE sleeve	0 / -0.045	85 +0.035 / 0	85 +0.120 / +0.070	80.155 / 80.020	0.201 / 0.020	2.490 / 2.440	8040 · 8050 · 8060 · 8070 · 8080 · 80100	Quote
Ø85 PTFE sleeve	0 / -0.054	90 +0.035 / 0	90 +0.120 / +0.070	85.155 / 85.020	0.209 / 0.020	2.490 / 2.440	8540 · 8550 · 8560 · 8570 · 8580 · 85100	Quote
Ø90 PTFE sleeve	0 / -0.054	95 +0.035 / 0	95 +0.120 / +0.070	90.155 / 90.020	0.209 / 0.020	2.490 / 2.440	9040 · 9050 · 9060 · 9070 · 9080 · 90100	Quote
Ø95 PTFE sleeve	0 / -0.054	100 +0.035 / 0	100 +0.120 / +0.070	95.155 / 95.020	0.209 / 0.020	2.490 / 2.440	9550 · 9560 · 9570 · 9580 · 95100	Quote
Ø100 PTFE sleeve	0 / -0.054	105 +0.035 / 0	105 +0.120 / +0.070	100.155 / 100.020	0.209 / 0.020	2.490 / 2.440	10050 · 10060 · 10070 · 10080 · 100100 · 100115	Quote
Ø105 PTFE sleeve	0 / -0.054	110 +0.035 / 0	110 +0.120 / +0.070	105.155 / 105.020	0.209 / 0.020	2.490 / 2.440	10560 · 10570 · 10580 · 105100 · 105115	Quote
Ø110 PTFE sleeve	0 / -0.054	115 +0.035 / 0	115 +0.120 / +0.070	110.115 / 110.020	0.209 / 0.020	2.490 / 2.440	11060 · 11070 · 11080 · 110100 · 110115	Quote
Ø120 PTFE sleeve	0 / -0.054	125 +0.040 / 0	125 +0.170 / +0.100	120.210 / 120.070	0.264 / 0.070	2.465 / 2.415	12060 · 12070 · 12080 · 120100 · 120115	Quote
Ø125 PTFE sleeve	0 / -0.063	130 +0.040 / 0	130 +0.170 / +0.100	125.210 / 125.070	0.273 / 0.070	2.465 / 2.415	12560 · 12570 · 12580 · 125100 · 125115	Quote
Ø130 PTFE sleeve	0 / -0.063	135 +0.040 / 0	135 +0.170 / +0.100	130.210 / 130.070	0.273 / 0.070	2.465 / 2.415	13060 · 13070 · 13080 · 130100 · 130115	Quote
Ø140 PTFE sleeve	0 / -0.063	145 +0.040 / 0	145 +0.170 / +0.100	140.210 / 140.070	0.273 / 0.070	2.465 / 2.415	14060 · 14070 · 14080 · 140100 · 140115	Quote
Ø150 PTFE sleeve	0 / -0.063	155 +0.040 / 0	155 +0.170 / +0.100	150.210 / 150.070	0.273 / 0.070	2.465 / 2.415	15060 · 15070 · 15080 · 150100 · 150115	Quote
Ø160 PTFE sleeve	0 / -0.063	165 +0.040 / 0	165 +0.170 / +0.100	160.210 / 160.070	0.273 / 0.070	2.465 / 2.415	16060 · 16070 · 16080 · 160100 · 160115	Quote
Ø180 PTFE sleeve	0 / -0.063	185 +0.046 / 0	185 +0.210 / +0.130	180.216 / 180.070	0.279 / 0.070	2.465 / 2.415	18060 · 18070 · 18080 · 180100	Quote
Ø190 PTFE sleeve	0 / -0.072	195 +0.046 / 0	195 +0.210 / +0.130	190.216 / 190.070	0.288 / 0.070	2.465 / 2.415	19060 · 19070 · 19080 · 190100	Quote
Ø200 PTFE sleeve	0 / -0.072	205 +0.046 / 0	205 +0.210 / +0.130	200.016 / 200.070	0.288 / 0.070	2.465 / 2.415	20060 · 20070 · 20080 · 200100	Quote
Ø220 PTFE sleeve	0 / -0.072	225 +0.046 / 0	225 +0.210 / +0.130	220.216 / 220.070	0.288 / 0.070	2.465 / 2.415	22060 · 22070 · 22080 · 220100	Quote
Ø250 PTFE sleeve	0 / -0.072	255 +0.052 / 0	255 +0.260 / +0.170	250.222 / 250.070	0.294 / 0.070	2.465 / 2.415	25080 · 250100	Quote
Ø260 PTFE sleeve	0 / -0.081	265 +0.052 / 0	265 +0.260 / +0.170	260.222 / 260.070	0.303 / 0.070	2.465 / 2.415	26080 · 260100	Quote
Ø280 PTFE sleeve	0 / -0.081	285 +0.052 / 0	285 +0.260 / +0.170	280.222 / 280.070	0.303 / 0.070	2.465 / 2.415	28080 · 280100	Quote
Ø300 PTFE sleeve	0 / -0.081	305 +0.052 / 0	305 +0.260 / +0.170	300.222 / 300.070	0.303 / 0.070	2.465 / 2.415	30080 · 300100	Quote

Values separated by a slash are upper / lower limits. Type a shaft diameter in the filter box to find a row; sizes and lengths not listed are made to drawing.

JBM-10F flanged PTFE bushings (mm)

Designation JBM-1F + bore + length × 10: JBM-1F20150 is a Ø20 bushing 15.0 mm long. Flange Ø tolerance ±0.5 mm, length ±0.25 mm, flange thickness −0.2 mm.

Designation	Bore d	OD D	Flange Ø F	Length L	Flange t	Shaft f7	Housing H7	OD before fitting	Installed bore	Clearance	Wall	Quote
JBM-1F06040	6	8	12	4	1	-0.013 / -0.028	8 +0.015 / 0	+0.055 / +0.025	6.055 / 5.990	0.077 / 0.000	1.005 / 0.980	Quote
JBM-1F06070	6	8	12	7	1	-0.013 / -0.028	8 +0.015 / 0	+0.055 / +0.025	6.055 / 5.990	0.077 / 0.000	1.005 / 0.980	Quote
JBM-1F08055	8	10	15	5.5	1	-0.013 / -0.028	10 +0.015 / 0	+0.055 / +0.025	8.055 / 7.990	0.083 / 0.003	1.005 / 0.980	Quote
JBM-1F08075	8	10	15	7.5	1	-0.013 / -0.028	10 +0.015 / 0	+0.055 / +0.025	8.055 / 7.990	0.083 / 0.003	1.005 / 0.980	Quote
JBM-1F10070	10	12	18	7	1	-0.016 / -0.034	12 +0.018 / 0	+0.055 / +0.025	10.058 / 9.990	0.086 / 0.003	1.005 / 0.980	Quote
JBM-1F10090	10	12	18	9	1	-0.016 / -0.034	12 +0.018 / 0	+0.055 / +0.025	10.058 / 9.990	0.086 / 0.003	1.005 / 0.980	Quote
JBM-1F10120	10	12	18	12	1	-0.016 / -0.034	12 +0.018 / 0	+0.055 / +0.025	10.058 / 9.990	0.086 / 0.003	1.005 / 0.980	Quote
JBM-1F12070	12	14	20	7	1	-0.016 / -0.034	14 +0.018 / 0	+0.065 / +0.030	12.058 / 11.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F12090	12	14	20	9	1	-0.016 / -0.034	14 +0.018 / 0	+0.065 / +0.030	12.058 / 11.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F12120	12	14	20	12	1	-0.016 / -0.034	14 +0.018 / 0	+0.065 / +0.030	12.058 / 11.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F14120	14	16	22	12	1	-0.016 / -0.034	16 +0.018 / 0	+0.065 / +0.030	14.058 / 13.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F14170	14	16	22	17	1	-0.016 / -0.034	16 +0.018 / 0	+0.065 / +0.030	14.058 / 13.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F15090	15	17	23	9	1	-0.016 / -0.034	17 +0.018 / 0	+0.065 / +0.030	15.058 / 14.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F15120	15	17	23	12	1	-0.016 / -0.034	17 +0.018 / 0	+0.065 / +0.030	15.058 / 14.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F15170	15	17	23	17	1	-0.016 / -0.034	17 +0.018 / 0	+0.065 / +0.030	15.058 / 14.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F16120	16	18	24	12	1	-0.016 / -0.034	18 +0.018 / 0	+0.065 / +0.030	16.058 / 15.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F16170	16	18	24	17	1	-0.016 / -0.034	18 +0.018 / 0	+0.065 / +0.030	16.058 / 15.990	0.092 / 0.006	1.005 / 0.980	Quote
JBM-1F18120	18	20	26	12	1	-0.016 / -0.034	20 +0.021 / 0	+0.075 / +0.035	18.061 / 17.990	0.095 / 0.006	1.005 / 0.980	Quote
JBM-1F18170	18	20	26	17	1	-0.016 / -0.034	20 +0.021 / 0	+0.075 / +0.035	18.061 / 17.990	0.095 / 0.006	1.005 / 0.980	Quote
JBM-1F18200	18	20	26	20	1	-0.016 / -0.034	20 +0.021 / 0	+0.075 / +0.035	18.061 / 17.990	0.095 / 0.006	1.005 / 0.980	Quote
JBM-1F20115	20	23	30	11.5	1.5	-0.020 / -0.041	23 +0.021 / 0	+0.075 / +0.035	20.071 / 19.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F20165	20	23	30	16.5	1.5	-0.020 / -0.041	23 +0.021 / 0	+0.075 / +0.035	20.071 / 19.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F20215	20	23	30	21.5	1.5	-0.020 / -0.041	23 +0.021 / 0	+0.075 / +0.035	20.071 / 19.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F22150	22	25	32	15	1.5	-0.020 / -0.041	25 +0.021 / 0	+0.075 / +0.035	22.071 / 21.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F22200	22	25	32	20	1.5	-0.020 / -0.041	25 +0.021 / 0	+0.075 / +0.035	22.071 / 21.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F25115	25	28	35	11.5	1.5	-0.020 / -0.041	28 +0.021 / 0	+0.075 / +0.035	25.071 / 24.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F25165	25	28	35	16.5	1.5	-0.020 / -0.041	28 +0.021 / 0	+0.075 / +0.035	25.071 / 24.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F25215	25	28	35	21.5	1.5	-0.020 / -0.041	28 +0.021 / 0	+0.075 / +0.035	25.071 / 24.990	0.112 / 0.010	1.505 / 1.475	Quote
JBM-1F30160	30	34	42	16	2	-0.025 / -0.050	34 +0.025 / 0	+0.075 / +0.035	30.085 / 29.990	0.126 / 0.010	2.005 / 1.970	Quote
JBM-1F30260	30	34	42	26	2	-0.025 / -0.050	34 +0.025 / 0	+0.075 / +0.035	30.085 / 29.990	0.126 / 0.010	2.005 / 1.970	Quote
JBM-1F35160	35	39	47	16	2	-0.025 / -0.050	39 +0.025 / 0	+0.085 / +0.045	35.085 / 34.990	0.135 / 0.015	2.005 / 1.970	Quote
JBM-1F35260	35	39	47	26	2	-0.025 / -0.050	39 +0.025 / 0	+0.085 / +0.045	35.085 / 34.990	0.135 / 0.015	2.005 / 1.970	Quote
JBM-1F40260	40	44	53	26	2	-0.025 / -0.050	44 +0.025 / 0	+0.085 / +0.045	40.085 / 39.990	0.135 / 0.015	2.005 / 1.970	Quote
JBM-1F40400	40	44	53	40	2	-0.025 / -0.050	44 +0.025 / 0	+0.085 / +0.045	40.085 / 39.990	0.135 / 0.015	2.005 / 1.970	Quote

Ø6–40 mm shaft in the standard series. The flange locates the bushing and carries light thrust; for real axial load add a JBM-10WC thrust washer.

JBM-10WC thrust washers (mm)

Flat washers with a locating hole. Tolerances: Di +0.25, Do −0.25, thickness ST −0.05, hole pitch Ø dp ±0.125, hole Ø dD +0.4 / +0.1, recess Ø Ha ±0.2, recess depth Hd +0.12.

Shaft	Designation	Inside Ø Di	Outside Ø Do	Thickness ST	Hole pitch Ø dp	Hole Ø dD	Recess depth Hd	Recess Ø Ha	Quote
Ø8 washer W10	W10	10	20	1.5	15	1.5	1	20	Quote
Ø10 washer W12	W12	12	24	1.5	18	1.5	1	24	Quote
Ø12 washer W14	W14	14	26	1.5	20	2	1	26	Quote
Ø14 washer W16	W16	16	30	1.5	23	2	1	30	Quote
Ø16 washer W18	W18	18	32	1.5	25	2	1	32	Quote
Ø18 washer W20	W20	20	36	1.5	28	3	1	36	Quote
Ø20 washer W22	W22	22	38	1.5	30	3	1	38	Quote
Ø22 washer W24	W24	24	42	1.5	33	3	1	42	Quote
Ø24 washer W26	W26	26	44	1.5	35	3	1	44	Quote
Ø26 washer W28	W28	28	48	1.5	38	4	1	48	Quote
Ø30 washer W32	W32	32	54	1.5	43	4	1	54	Quote
Ø36 washer W38	W38	38	62	1.5	50	4	1	62	Quote
Ø40 washer W42	W42	42	66	1.5	54	4	1	66	Quote
Ø46 washer W48	W48	48	74	2	61	4	1.5	74	Quote
Ø50 washer W52	W52	52	78	2	65	4	1.5	78	Quote
Ø60 washer W62	W62	62	90	2	76	4	1.5	90	Quote

The washer is located by a pin in the hole dD and sits in a recess Ha × Hd so that it cannot rotate. Larger washers and washers without a locating hole are made to drawing.

JBM-10SP strip (mm)

Flat composite strip for wear plates, guides and stamped shapes.

Designation	Length	Width	Wall thickness	Quote
JBM-10SP	500 ± 1	150 ± 1	1.0 −0.05	Quote
JBM-10SP	500 ± 1	150 ± 1	1.5 −0.05	Quote
JBM-10SP	500 ± 1	150 ± 1	2.0 −0.05	Quote
JBM-10SP	500 ± 1	150 ± 1	2.5 −0.05	Quote

Free bore and installed bore

A wrapped composite bushing is a split sleeve rolled from strip. In the free state its outside diameter is larger than the housing and its split is open; a caliper reading of the free bore means little. When the bushing is pressed into an H7 housing the housing closes it to the installed bore in the table, and the installed bore against an f7 shaft gives the running clearance in the next column. Inspect the bore in a ring gauge or a test housing, not loose on the bench (ISO 3547-2 describes the method).

The steel back is thin, so the housing sets the geometry: an out-of-round or oversize housing gives an out-of-round or loose bushing. Machine the housing to H7 with a 15–20° lead-in chamfer and press with a stepped mandrel that supports the bore so the split edges cannot fold in.

Shaft, housing and clearance

The f7 shaft and H7 housing in the tables are the catalogue standard and give the clearances listed: about 0.08 mm at Ø10, 0.15 mm at Ø50 and 0.3 mm at Ø300. Thermal growth of an aluminium housing, high temperature or a long bushing may need more clearance, a precision pivot in oil may need less; state the shaft tolerance you intend to use and we confirm the fitted bore. Because the PTFE running layer is thin, the bushing is never re-machined after pressing.

The shaft is the counterface for the PTFE film: steel, hardened where the load allows, ground to about Ra 0.2–0.4 µm. The same sizes are supplied with a bronze back (JBM-1B) or a stainless back (JBM-1S) for corrosive service.

Ordering a size

Quote the part code from the table, or write shaft diameter × housing bore × length with the form (sleeve, flanged, washer, strip) and the quantity. Lengths between the catalogue lengths, chamfers, holes and bushings for Ø300+ shafts are made to drawing; there is no minimum order and a sample of the reference size is free.

FAQ

Frequently asked questions

What sizes do PTFE bushings come in?

The JBM-10 standard series covers Ø6–300 mm shafts in 48 bores with 1.0, 1.5, 2.0 and 2.5 mm walls and lengths from 6 to 100 mm; flanged bushings cover Ø6–40 mm and thrust washers Ø8–60 mm. Other sizes are made to drawing.

Why is the free bore of my PTFE bushing larger than the table value?

Because the bushing is a split sleeve made oversize for a press fit. The bore in the table is the installed bore, reached only after the bushing is pressed into an H7 housing. Measure it in a ring gauge or test housing.

What shaft tolerance should I use with a JBM-10 bushing?

The catalogue pairs an f7 shaft with an H7 housing; the clearance column shows the result. A different shaft class changes the running clearance and is confirmed at quotation.

Are JBM-10 sizes interchangeable with DU bushings?

The dimension series is the common ISO 3547 system, so nominal sizes and part codes usually correspond, but interchangeability is confirmed part by part from the drawing, never from the code alone.

Are the sizes in stock?

Sizes are made to order and confirmed at quotation. Standard sizes ship faster than specials because the strip and tooling are on hand; there is no minimum order quantity.

Quote a JBM-10 size from the table.

Use the “Quote” link on any row, or send shaft × housing × length with the form and quantity. Samples are free; sizes not listed are made to drawing.

Request a quotation PTFE composite bushings

Quote response: 12 h · Free samples · No MOQ