JM / M Series Tapered Roller Bearings – Inch, Heavy Duty
GBC-supplied JM, JW, J and M series inch tapered roller bearings, d 21–75 mm. High load-to-bore ratio, wide T-section design. Interchangeable with SKF, FAG, NSK and Timken
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
JM / JW / J / M SERIES INCH TAPERED ROLLER BEARINGS
Series Overview
The JM, JW, J and M series group several inch tapered roller bearing families sharing medium-bore sizing and high load capacity relative to their dimensions. The JM series and JW series are heavy-section bearings with wide T-dimensions, suited to high combined loading. The M series covers bore diameters from 21 mm to 41 mm, commonly used in agricultural and automotive applications.
Supplied by GBC as matched cone-and-cup assemblies, MOQ 100 pieces.
Key Design Features
High load-to-bore ratio
Proportionally wider than standard inch series, providing higher combined load capacity within a given bore size.
Wide T-section design
Wide assembly width provides extended roller contact, distributing load over a greater surface and improving fatigue life.
Direct OEM interchange
All JM, JW, J and M series bearings are dimensionally equivalent to SKF, FAG, NSK and Timken equivalents.
Suited to compact gearbox designs
High load capacity within moderate bore size is effective in compact industrial and agricultural gearboxes.
Boundary dimensions: d bore · D outer diameter · T / B width (mm)
Complete Specification Table
Dimensions in mm · Load ratings in N · Weight in kg
JM / JW / J sub-series (d 28–75 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| JM205149/10 | 50.000 | 90.000 | 28.000 | 115,000 | 154,000 | 0.74 |
| JM207049A/10 | 55.000 | 95.000 | 29.000 | 121,000 | 168,000 | 0.81 |
| JM714249/10 | 75.000 | 120.000 | 31.000 | 148,000 | 229,000 | 1.30 |
| JW6049/JW6010 | 60.000 | 125.000 | 37.000 | 158,000 | 209,000 | 2.04 |
| J15585/15520 | 28.000 | 57.150 | 17.462 | 42,600 | 50,100 | 0.21 |
M sub-series (d 21–41 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| M12649/10 | 21.430 | 50.005 | 17.526 | 40,800 | 43,500 | 0.16 |
| M802048/11 | 41.275 | 82.550 | 26.543 | 84,900 | 112,000 | 0.62 |
| M84548/10 | 25.400 | 57.150 | 19.431 | 44,900 | 52,900 | 0.23 |
| M86649/10 | 30.162 | 64.292 | 21.433 | 55,700 | 71,700 | 0.33 |
| M88046/10 | 31.750 | 68.262 | 22.225 | 59,600 | 77,400 | 0.40 |
| M88048/10 | 33.338 | 68.262 | 22.225 | 59,600 | 77,400 | 0.37 |
Typical Applications
JM, JW and M series bearings serve compact, high-load drivetrain and gearbox applications.
Compact industrial gearboxes
Speed reducer output shafts, mixer and agitator drives, pump gearboxes
Agricultural drivetrains
Gearbox shafts, PTO gearbox assemblies, implement drive units
Light vehicle axle ends
Utility trailer axle bearings, light 4WD hub units, ATV drivetrain shafts
OEM replacement
Direct replacement for JM and M prefix bearings in North American and European equipment
Need a JM, JW or M series bearing?
Contact us for pricing and availability. We can cross-reference JM, JW, J and M series numbers against Timken, SKF and NSK equivalents.
GBC-supplied JM, JW, J and M series inch tapered roller bearings, d 21–75 mm. High load-to-bore ratio, wide T-section design. Interchangeable with SKF, FAG, NSK and Timken
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
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