Journal Bearings Overview

Royersford Journal Bearings are backed by generations of American manufacturing experience, delivering reliable performance, material flexibility, long service life, precision machining for demanding industrial environments, and the confidence that comes from domestic production. Our Journal Bearings are made in the USA and built for reliable, continuous operation in base-load applications running at moderate speeds.

Key Benefits:

Designed for continuous duty at moderate operating speeds
Available in solid or split housings and a choice of Babbitt or Bronze liner materials
Manufactured with a high-strength gray iron housing

Special materials available for high-temperature, submerged, or unique applications
Slotted mounting holes for easy alignment and adjustment
Precision-machined and ready-to-install construction

Multiple material and configuration options reduce customization lead time
Alternate housing and liner materials, non-standard sizes, and metric sizes available upon request

Bearing Materials & Temperature Ratings:

Royersford Journal Bearings are available in multiple materials to suit specific load and temperature requirements:

Babbitt Bearings

Recommended for ambient temperatures up to 130°s F
Ideal for standard base-load applications

Bronze Bearings

Suitable for higher or impact loads
Operates at ambient temperatures up to 300°s F

Specialty Materials:

Alternate liner materials include, but are not limited to: UHMW, Ryertex, Aluminum Bronze, Oilite Bronze
Alternate housing materials include, but are not limited to: Steel, Cast Iron with Specialty Coatings, and plastic

Housing & Construction:

American-made and machined housings, broached and bored for precise fit
Integrated grease grooves for consistent lubrication
Housings tapped for grease cups or pressure style fittings
Ends finished to serve as bearing surfaces for sheaves or collars

Installation Advantages:

Simple, compact design supports fast installation and minimizes downtime
Slotted mounting allows easy alignment and adjustment
Factory machining and material options reduce on-site work and downtime

Common Industry Applications & Equipment Uses

Include but are not limited to:

Aggregates

Mining

Cement

Bulk Material Handling

Pulp & Paper

Conveyor

Marine Propulsion

Oil & Gas

Water & Waste Treatment

Steel & Metals Processing

Material Handling

Applications:

Power Transmission & Line Shafting
Conveyor Rollers & Idlers

Fans, Blowers, Pumps, and Rotating Equipment
Light to Moderate-Duty Machinery

Journal Bearing Products

Solid Journal Bearings

52 Products

Split Journal Bearings

67 Products

Rigid Split Journal Bearings

44 Products

Rigid Split Journal Bearings - Gibbed Joint

30 Products

Rigid 40° Angle Split Journal Bearings

22 Products

Journal Bearing Nomenclature

*All standard units include suffix -501
**Additional suffixes (5XX) will be used to designate modified or special assemblies

Replacement Nomenclature

Selection

Royersford Journal Bearings are compact plain bearings designed to support continuous radial loads at moderate shaft speeds. They are available in solid and split styles and constructed with babbitt or bronze bearing materials for different operating conditions.

Selection Criteria:

To select the correct Journal Bearing:

Determine the operating conditions: radial load, shaft speed, lubrication method, and ambient temperature.
Choose a bearing rating from the load tables below with a radial load rating at or above the expected load and speed for your application.
Ensure bearings operate within the recommended conditions listed in this section.

Operating Requirements:

For the load ratings in the tables to apply, the following conditions must be maintained:

Adequate grease lubrication must be provided and maintained.
Proper bearing alignment must be achieved and maintained for uniform load distribution.
Normal running loads should not exceed values in the load tables. Occasional peak loads should not exceed ratings by more than 100%.
The direction of load should be at least 30° away from the grease groove or, if applicable, the joint between the cap and base.
Shaft journal surface finish should meet commercial shafting standards (approximately 32 micro inches), and journal diameters should be within standard tolerances.
Ambient temperature limits are 130 °F for babbitted bearings and 300 °F for bronze bushed bearings. If the shaft conducts heat from another source, the journal surface temperature must stay within these limits.

Bearings must be protected from adverse operating conditions. If conditions fall outside the recommended ranges, apply a service factor up to 2.0 for values left of the zigzag line in the ratings tables and up to 3.0 for values right of it.

Table 1 - MPTA RADIAL LOAD RATINGS FOR RIGID BABBITTED SLEEVE BEARINGS STD. NO. 401

Shaft Size	RPM
Shaft Size	10	50	100	150	200	250	300	350	400	450	500	600	700	800	900	1000
¹⁄2	100	100	100	95	95	95	95	95	90	90	90	85	85	85	80	80
⁵⁄8	150	150	145	145	140	140	135	135	135	135	130	125	120	115	110	110
³⁄4	180	175	175	170	170	165	160	160	155	155	150	145	140	130	125	120
⁷⁄8	260	255	250	245	240	235	230	225	220	215	210	200	190	180	150	----
¹⁵⁄16	280	275	265	260	255	250	245	240	235	225	220	210	200	185	105	----
1	295	290	285	280	270	265	260	250	245	240	230	220	205	----	----	----
1 ¹⁄8	415	410	400	390	380	370	355	345	335	325	315	295	245	----	----	----
1 ³⁄16, 1 ¹⁄4	440	430	420	410	395	385	375	360	350	340	325	305	190	----	----	----
1 ⁵⁄16, 1 ³⁄8	585	570	555	535	520	505	485	470	455	435	420	345	----	----	----	----
1 ⁷⁄16, 1 ¹⁄2	640	625	605	585	565	545	525	500	480	460	440	205	----	----	----	----
1 ¹¹⁄16, 1 ³⁄4	875	850	820	785	755	720	690	655	625	590	340	----	----	----	----	----
1 ¹⁵⁄16, 2	1150	1110	1060	1010	965	915	865	815	730	335	----	----	----	----	----	----
2 ³⁄16, 2 ¹⁄4	1460	1400	1330	1260	1190	1100	1050	975	410	----	----	----	----	----	----	----
2 ⁷⁄16, 2 ¹⁄2	1800	1730	1630	1530	1430	1340	1240	645	----	----	----	----	----	----	----	----
2 ¹¹⁄16, 2 ³⁄4	2190	2080	1950	1820	1690	1560	1150	510	----	----	----	----	----	----	----	----
2 ¹⁵⁄16, 3	2600	2470	2300	2130	1960	1790	675	----	----	----	----	----	----	----	----	----
3 ⁷⁄16, 3 ¹⁄2	3550	3330	3060	2790	2520	1200	----	----	----	----	----	----	----	----	----	----
3 ¹⁵⁄16, 4	4640	4310	3910	3500	2760	----	----	----	----	----	----	----	----	----	----	----
4 ⁷⁄16, 4 ¹⁄2	5870	5410	4830	4250	1410	----	----	----	----	----	----	----	----	----	----	----
4 ¹⁵⁄16, 5	7240	6600	5810	5010	----	----	----	----	----	----	----	----	----	----	----	----
5 ⁷⁄16, 5 ¹⁄2	8750	7900	6840	4360	----	----	----	----	----	----	----	----	----	----	----	----
5 ¹⁵⁄16, 6	10410	9300	7910	2390	----	----	----	----	----	----	----	----	----	----	----	----
For Speeds Lower Than 10 RPM Consult Factory.

Table 2 - MPTA RADIAL LOAD RATINGS FOR RIGID BRONZE SLEEVE BEARINGS STD. NO. 401

Shaft Size	RPM
Shaft Size	10	50	100	150	200	250	300	350	400	450	500	600	700	800	900	1000
¹⁄2	170	170	165	165	165	165	165	160	160	160	160	155	155	150	150	145
⁵⁄8	250	250	245	245	245	240	240	235	235	235	230	255	220	220	215	210
³⁄4	300	300	295	295	290	285	285	280	280	275	270	265	260	255	250	240
⁷⁄8	435	430	425	420	415	410	405	400	395	390	385	375	365	355	325	245
¹⁵⁄16	465	460	455	450	445	435	430	425	420	415	410	395	385	375	295	200
1	495	490	485	480	470	465	460	450	445	440	430	420	405	360	255	150
1 ¹⁄8	700	690	680	670	660	650	640	630	620	605	595	575	525	360	195	----
1 ³⁄16 1 ¹⁄4	735	730	715	705	695	680	370	660	645	635	625	600	485	300	115	----
1 ⁵⁄16 1 ³⁄8	980	965	950	930	915	895	880	865	845	830	815	735	465	195	----	----
1 ⁷⁄16 1 ¹⁄2	1070	1050	1030	1010	995	975	955	935	915	895	875	635	315	----	----	----
1 ¹¹⁄16 1 ³⁄4	1470	1440	1410	1370	1340	1310	1280	1240	1210	1180	930	410	----	----	----	----
1 ¹⁵⁄16 2	1920	1880	1830	1790	1740	1690	1640	1590	1500	1110	715	----	----	----	----	----
2 ³⁄16 2 ¹⁄4	2440	2390	2320	2240	2170	2100	2030	1960	1390	830	265	----	----	----	----	----
2 ⁷⁄16 2 ¹⁄2	3020	2940	2850	2750	2650	2560	2460	1860	1090	----	----	----	----	----	----	----
2 ¹¹⁄16 2 ³⁄4	3660	3560	3430	3300	3170	3040	2620	1580	545	----	----	----	----	----	----	----
2 ¹⁵⁄16 3	4370	4230	4060	3890	3720	3550	2440	----	----	----	----	----	----	----	----	----
3 ⁷⁄16 3 ¹⁄2	5960	5740	5470	5200	4930	3610	1440	----	----	----	----	----	----	----	----	----
3 ¹⁵⁄16 4	7790	7460	7060	6650	5910	----	----	----	----	----	----	----	----	----	----	----
4 ⁷⁄16 4 ¹⁄2	9860	9400	8820	8240	5400	----	----	----	----	----	----	----	----	----	----	----
4 ¹⁵⁄16 5	12180	11540	10740	9950	4090	----	----	----	----	----	----	----	----	----	----	----
5 ⁷⁄16 5 ¹⁄2	14740	13880	12820	10340	1820	----	----	----	----	----	----	----	----	----	----	----
5 ¹⁵⁄16 6	17530	16420	15040	9520	----	----	----	----	----	----	----	----	----	----	----	----
6 ⁷⁄16 6 ¹⁄2	20560	19150	17390	7900	----	----	----	----	----	----	----	----	----	----	----	----
6 ¹⁵⁄16 7	23840	22070	19870	5350	----	----	----	----	----	----	----	----	----	----	----	----
7 ⁷⁄16 7 ¹⁄2	29170	26850	23950	1880	----	----	----	----	----	----	----	----	----	----	----	----
7 ¹⁵⁄16 8	31090	28450	23410	----	----	----	----	----	----	----	----	----	----	----	----	----
For Speeds Lower Than 10 RPM Consult Factory