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Bronze Specifications

Spyraflo Bronze Bearings are manufactured to the SAE 840 Bearing Specification, containing a minimum of 25% oil to ensure lubrication for life. The oil is retained within the porous bronze bearing structure and is drawn to the surface by a hydrodynamic process ensuring a permanent film of oil is maintained between the bearing and the mating shaft surface. The surface finish of the mating shaft is critical to the performance of the bronze bearing as is achieving the minimum speed and load to create the correct hydraulic reaction.
 
Bronze Bearing Features:

• Medium Speed, Medium Load
• Rotational and/or Oscillatory Motion only
• Electrically conductive
  

Bronze | Self-Align/Self-Clinch
(To obtain the Stainless Steel CAD drawing, you can either download the corresponding Steel Model, or request the actual drawing by email. sales@spyraflo.com)
Nominal I.D.	I.D. Actual	Max Radial Dyn Load	Max Speed	Panel Hole	Min, Panel Thick	Min. Dist. C/L to Edge	Flange Dia.	Bearing Length	Part No. Steel	Part No. Stainless Steel
	min. max.	lbf / N	r.p.m.	A	B		C	D
1/8"	.1255-.1260	70	30550	.344	.04	.24	.39	.29	FSB-125	FSSB-125
3/16"	.1883-.1888	140	20310	.500	.04	.38	.55	.40	FSB-187	FSSB-187
1/4"	.2508-.2513	190	15270	.500	.04	.38	.55	.40	FSB-250	FSSB-250
5/16"	.3133-.3140	270	12240	.625	.06	.45	.67	.46	FSB-312	FSSB-312
3/8"	.3758-.3765	320	10180	.625	.06	.45	.67	.46	FSB-375	FSSB-375
1/2"	.5010-.5017	600	7640	.812	.06	.50	.87	.64	FSB-500	FSSB-500
5/8"	.6260-.6270	890	6110	1.063	.09	.75	1.10	.77	FSB-625	FSSB-625
3/4"	.7510-.7520	1280	5090	1.250	.09	.75	1.30	.89	FSB-750	FSSB-750
4MM	4.01-4.03	530	24170	12.70	1.0	9.5	14.0	10.2	FSB-4M	FSSB-4M
6MM	6.02-6.04	790	16110	12.70	1.0	9.5	14.0	10.2	FSB-6M	FSSB-6M
8MM	8.02-8.04	1190	12120	15.90	1.5	11.5	17.0	11.5	FSB-8M	FSSB-8M
10MM	10.02-10.04	1490	9700	15.90	1.5	11.5	17.0	11.5	FSB-10M	FSSB-10M
12MM	12.03-12.05	2530	8060	20.60	1.5	12.7	22.0	16.3	FSB-12M	FSSB-12M
15MM	15.03-15.05	3750	6460	27.00	2.3	19.0	28.0	19.4	FSB-15M	FSSB-15M
18MM	18.03-18.05	5370	5380	31.80	2.3	19.0	33.0	22.5	FSB-18M	FSSB-18M

Bronze | Self-Align/Press-Fit
Nominal I.D.	I.D. Actual	Max. Radial Dyn. Load	Max Speed	Mounting Hole	Flange Dia.	Flange Height	Bearing Length	Part No.
	min. max.	lbf / N	r.p.m.	A	B	C	D
1/8"	.1255-.1260	70	30550	.344	.41	.03	.27	PSB-125
3/16"	.1883-.1888	140	20310	.500	.56	.03	.38	PSB-187
1/4"	.2508-.2513	190	15270	.500	.56	.03	.38	PSB-250
5/16"	.3133-.3140	270	12240	.625	.69	.03	.43	PSB-312
3/8"	.3758-.3765	320	10180	.625	.69	.03	.43	PSB-375
1/2"	.5010-.5017	600	7640	.812	.88	.03	.60	PSB-500
5/8"	.6260-.6270	890	6110	1.063	1.13	.03	.77	PSB-625
4MM	4.01-4.03	530	24170	12.70	14.2	.75	9.6	PSB-4M
6MM	6.02-6.04	790	16110	12.70	14.2	.75	9.6	PSB-6M
8MM	8.02-8.04	1190	12120	15.90	17.4	.75	10.8	PSB-8M
10MM	10.02-10.04	1490	9700	15.90	17.4	.75	10.8	PSB-10M
12MM	12.03-12.05	2430	8060	20.60	22.2	.75	15.2	PSB-12M
15MM	15.03-15.05	3750	6460	27.00	28.5	.75	19.6	PSB-15M

Bronze | Self-Align/Flange-Mount
Bearing I.D. Nominal	I.D. Actual	Max Radial Dyn Load	Max Speed	Brng Clear. Dia.	Flange Lgth	Flange Wdth	Mount. Hole Ctrs.	Flange Thick	Height	Hole Dia.	Part No.
	min. max.	lbf/N	r.p.m.	A	B	C	D	E	F	G
3/16"	.1883-.1888			13/32	1.80	.88	1.22	.05	.40	7/32	BFM-187-B
1/4"	.2508-.2513	190	15270	17/32	1.80	.88	1.22	.05	.40	7/32	BFM-250-B
5/16"	.3133-.3140	270	12240	21/32	2.10	1.19	1.53	.06	.46	7/32	BFM-312-B
3/8"	.3758-.3765	320	10180	21/32	2.10	1.19	1.53	.06	.46	7/32	BFM-375-B
1/2"	.5010-.5017	600	7640	27/32	2.35	1.44	1.78	.06	.64	7/32	BFM-500-B
5/8"	.6260-.6270	890	6110	1 3/32	2.35	1.56	1.78	.09	.77	7/32	BFM-625-B
3/4"	.7510-.7520	1280	5090	1 9/32	2.35	1.85	1.78	.09	.89	7/32	BFM-750-B
4MM	4.01-4.03	530	21470	13.8	45.0	22.0	31.0	1.2	10.2	5.5	BFM-4M-B
6MM	6.02-6.04	790	16110	13.8	45.0	22.3	31.0	1.2	10.2	5.5	BFM-6M-B
8MM	8.02-8.04	1190	12120	17.0	53.0	30.2	39.0	1.5	11.5	5.5	BFM-8M-B
10MM	10.02-10.04	1490	9700	17.0	53.0	30.2	39.0	1.5	11.5	5.5	BFM-10M-B
12MM	12.03-12.05	2530	8060	21.7	60.0	36.5	45.2	1.5	16.3	5.5	BFM-12M-B
15MM	15.03-15.05	3750	6460	28.1	60.0	39.7	45.2	2.3	19.4	5.5	BFM-15M-B
18MM	18.03-18.05	5370	5380	32.9	60.0	47.0	45.2	2.3	22.5	5.5	BFM-18M-B

Bronze SAE 840 | Pillow Block
I.D. Nominal	I.D. Actual Min/Max	A	B	C	D	E	F	G	Max. Speed (rpm)	*Max Radial Dyn Load	Part No.
1/4"	.2508-.2513	9/16	2 1/4	1 3/4	1 1/8	3/8	9/32	1/4	9160	110 lbf	PB1-250-B
5/16"	.3133-.3140	9/16	2 1/4	1 3/4	1 1/8	7/16	9/32	1/4	7340	160 lbf	PB1-312-B
3/8"	.3758-.3765	9/16	2 1/4	1 3/4	1 1/8	7/16	9/32	1/4	6110	190 lbf	PB1-375-B
1/2"	.5010-.5017	9/16	2 1/4	1 3/4	1 1/8	5/8	9/32	1/4	4580	360 lbf	PB1-500-B
1/2"	.5010 - .5017	1	4	3 1/8	1 15/16	29/32	11/32	13/32	4580	700 lbf	PB3-500-B
5/8"	.6260-.6270	3/4	3 1/4	2 1/2	1 9/16	25/32	11/32	5/16	3670	530 lbf	PB2-625-B
5/8"	.6260 - .6270	1	4	3 1/8	1 15/16	29/32	11/32	13/32	3670	800 lbf	PB3-625-B
3/4"	.7510-.7520	3/4	3 1/4	2 1/2	1 9/16	7/8	11/32	5/16	3060	770 lbf	PB2-750-B
3/4"	.7510 - .7520	1	4	3 1/8	1 15/16	29/32	11/32	13/32	3060	900 lbf	PB3-750-B
7/8"	.8760-.8780	1	4	3 1/8	1 15/16	29/32	11/32	13/32	2620	750 lbf	PB3-875-B
1"	1.001-1.003	1 1/4	5	4	2 9/16	29/32	9/16	9/16	2290	850 lbf	PB4-1000-B
1 1/4"	1.251-1.253	1 1/4	5	4	2 9/16	15/16	9/16	9/16	1830	1320 lbf	PB4-1250-B
6mm	6.020-6.040	14.5	57.0	44.5	28.5	9.5	7.0	6.5	9670	480 N	PB1-6M-B
8mm	8.020-8.040	14.5	57.0	44.5	28.5	11.0	7.0	6.5	7270	720 N	PB1-8M-B
10mm	10.020-10.040	14.5	57.0	44.5	28.5	11.0	7.0	6.5	5820	890 N	PB1-10M-B
12mm	12.030-12.050	14.5	57.0	44.5	28.5	16.0	7.0	6.5	4830	1520 N	PB1-12M-B
15mm	15.030-15.050	19.0	82.5	63.5	39.5	20.0	8.7	8.0	3880	2250 N	PB2-15M-B
18mm	18.030-18.050	19.0	82.5	63.5	39.5	23.0	8.7	8.0	3230	3220 N	PB2-18M-B
25mm	25.030-25.070	32.0	127.0	101.5	65.0	23.0	14.3	14.5	2330	3730 N	PB4-25M-B
30mm	30.030-30.070	32.0	127.0	101.5	65.0	24.0	14.3	14.5	1940	5550 N	PB4-30M-B

Bronze SAE 840 | Housing Flange
I.D. Nominal	I.D. Actual Min/Max	A	B	C	D	E	F	Max. Spd. (rpm)	Max. Radial Dyn Load	Part No.
1/4"	.2508-.2513	1 5/8	1 1/4	3/4	3/8	3/16	11/64	9160	190 lbf	HF1-250-B
5/16"	.3133-.3140	2 1/4	1 3/4	1 1/8	7/16	3/16	9/32	7340	270 lbf	HF2-312-B
3/8"	.3758-.3765	2 1/4	1 3/4	1 1/8	7/16	3/16	9/32	6110	320 lbf	HF2-375-B
1/2"	.5010-.5017	2 1/4	1 3/4	1 1/8	5/8	3/16	9/32	4580	340 lbf	HF2-500-B
1/2"	.5010 - .5017	4	3 1/8	1 7/8	29/32	5/16	13/32	4580	700 lbf	HF4-500-B
5/8"	.6260-.6270	3 1/4	2 1/2	1 5/8	25/32	1/4	13/32	3670	700 lbf	HF3-625-B
5/8"	.6260 - .6270	4	3 1/8	1 7/8	29/32	5/16	13/32	3670	800 lbf	HF4-625-B
3/4"	.7510-.7520	3 1/4	2 1/2	1 5/8	7/8	1/4	13/32	3060	700 lbf	HF3-750-B
3/4"	.7510 - .7520	4	3 1/8	1 7/8	29/32	5/16	13/32	3060	900 lbf	HF4-750-B
7/8"	.8760-.8780	4.0	3 1/8	1 7/8	29/32	5/16	13/32	2620	900 lbf	HF4-875-B
1"	1.001-1.003	5.0	4.0	2 5/8	29/32	3/8	9/16	2290	1600 lbf	HF5-1000-B
1 1/4"	1.251-1.253	5.0	4.0	2 5/8	15/16	3/8	9/16	1830	1800 lbf	HF5-1250-B
6mm	6.020-6.040	41.5	32.0	19.0	9.5	5.0	4.5	9670	790 N	HF1-6M-B
8mm	8.020-8.040	57.0	44.5	28.5	11.0	5.0	7.0	7270	1190 N	HF2-8M-B
10mm	10.020-10.040	57.0	44.5	28.5	11.0	5.0	7.0	5820	1490 N	HF2-10M-B
12mm	12.030-12.050	57.0	44.5	28.5	15.9	5.0	7.0	4830	1520 N	HF2-12M-B
15mm	15.030-15.050	82.5	63.5	41.5	20.0	6.5	10.5	3880	3110 N	HF3-15M-B
18mm	18.030-18.050	82.5	63.5	41.5	22.0	6.5	10.5	3230	4000 N	HF3-18M-B
25mm	25.030-25.070	127.0	101.5	66.5	23.0	9.5	14.5	2330	7260 N	HF5-25M-B
30mm	30.030-30.070	127.0	101.5	66.5	24.0	9.5	14.5	1940	8170 N	HF5-30M-B

More Information:
Bronze Overview
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