HM Series Tapered Roller Bearings – HM803 / HM804 / HM807 / HM813 / HM88 / HM89
GBC-supplied HM small bore inch tapered roller bearings, d 32–71 mm. Covers HM803, HM804, HM807, HM813, HM88, HM89, HM903 and HM911 sub-series. Interchangeable with SKF, FAG, NSK and Timken
MOQ: 50 pcs. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
HM SERIES TAPERED ROLLER BEARINGS — SMALL BORE (HM803–HM911)
Series Overview
The HM small bore series groups eight sub-series of inch-dimensioned tapered roller bearings covering bore diameters from 32 mm to 71 mm. The HM88 and HM89 sub-series are particularly high-volume agricultural replacement bearings found in tractor and implement axle assemblies.
All models are supplied by GBC as matched cone-and-cup assemblies, interchangeable with SKF, FAG, NSK and Timken. MOQ 100 pieces.
Key Design Features
High static load for shock applications
Dimensioned for intermittent shock loading typical of agricultural implement axles and tractor gearboxes. Static load ratings up to 256,000 N.
Heavy-section cup and cone
Wider T-dimension provides greater roller contact length and improved load distribution under combined radial and thrust loads.
Interchangeable with OEM parts
Direct replacements for OEM HM-designated bearings in North American agricultural and industrial equipment.
Suffix variants for fit flexibility
Suffix numbers (/10, /11) indicate matched cup variants with slight dimensional differences for correct housing fit.
Boundary dimensions: d bore · D outer diameter · T / B width (mm)
Complete Specification Table
Dimensions in mm · Load ratings in N · Weight in kg
HM803 (d 41–44 mm, D 88.9 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| HM803145/10 | 41.275 | 88.900 | 30.162 | 105,000 | 144,000 | 0.90 |
| HM803146/10 | 41.275 | 88.900 | 30.162 | 105,000 | 144,000 | 0.89 |
| HM803149/10 | 44.450 | 88.900 | 30.162 | 105,000 | 144,000 | 0.84 |
HM804 (d 44–48 mm, D 95.25 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| HM804843/10 | 44.450 | 95.250 | 30.162 | 115,000 | 157,000 | 1.01 |
| HM804848/10 | 48.412 | 95.250 | 30.162 | 115,000 | 157,000 | 0.95 |
HM807 (d 44–54 mm, D 104.775 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| HM807040/10 | 44.450 | 104.775 | 36.512 | 159,000 | 223,000 | 1.62 |
| HM807044/10 | 49.212 | 104.775 | 36.512 | 159,000 | 223,000 | 1.52 |
| HM807046/10 | 50.800 | 104.775 | 36.512 | 159,000 | 223,000 | 1.49 |
| HM807049/10 | 53.975 | 104.775 | 36.512 | 159,000 | 223,000 | 1.41 |
HM813 (d 60–71 mm, D 127 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| HM813841/10 | 60.325 | 127.000 | 36.512 | 179,000 | 256,000 | 2.61 |
| HM813843/10 | 61.912 | 127.000 | 36.512 | 179,000 | 256,000 | 2.61 |
| HM813849/10 | 71.438 | 127.000 | 36.512 | 179,000 | 256,000 | 2.28 |
HM88 (d 32–36 mm, D 72–73 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| HM88542/10 | 31.750 | 73.025 | 29.370 | 80,600 | 111,000 | 0.61 |
| HM88547/10 | 33.338 | 73.025 | 29.370 | 80,600 | 111,000 | 0.59 |
| HM88648/10 | 35.717 | 72.233 | 25.400 | 71,100 | 94,200 | 0.48 |
| HM88649/10 | 34.925 | 72.233 | 25.400 | 71,100 | 94,200 | 0.50 |
HM89 (d 33–37 mm, D 76–79 mm)
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| HM89249/10 | 36.512 | 79.375 | 29.370 | 98,100 | 121,000 | 1.02 |
| HM89443/10 | 33.338 | 76.200 | 29.370 | 86,200 | 119,000 | 0.66 |
| HM89446/10 | 34.925 | 76.200 | 29.370 | 86,200 | 119,000 | 0.64 |
| HM89449/10 | 36.512 | 76.200 | 29.370 | 86,200 | 119,000 | 0.62 |
| HM89449/11 | 36.512 | 76.200 | 29.370 | 86,200 | 119,000 | 0.63 |
HM903 and HM911
| Bearing No. | d | D | T | Dynamic (N) | Static (N) | Weight (kg) |
|---|---|---|---|---|---|---|
| HM903249/10 | 44.450 | 95.250 | 30.958 | 107,000 | 132,000 | 1.00 |
| HM911242/10 | 53.975 | 130.175 | 36.512 | 154,000 | 183,000 | 2.22 |
Typical Applications
HM small bore series bearings are predominantly used in agricultural and light industrial applications.
Tractor axles and wheel hubs
Front axle spindle bearings, rear axle housing end bearings, 4WD hub units
Agricultural implements
Baler flywheel shafts, header drive hubs, planter row unit pivot bearings
Light industrial gearboxes
Small speed reducer shafts, mixer drive gearboxes
Maintenance replacement
Direct OEM replacement for HM-designated bearings in North American agricultural equipment
Need an HM series bearing?
Contact us for pricing and availability. We can cross-reference HM sub-series numbers against SKF, FAG, NSK and Timken equivalents.
GBC-supplied HM small bore inch tapered roller bearings, d 32–71 mm. Covers HM803, HM804, HM807, HM813, HM88, HM89, HM903 and HM911 sub-series. 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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