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Brand:OTOTRI
Product origin:China
Delivery time:3-5 days
Supply capacity:Mass production
HK0810 Drawn Cup Needle Roller Bearing — 8 × 12 × 10 mm, Open End
HK0810 is an open-end drawn cup needle roller bearing: 8 mm bore (Fw), 12 mm outside diameter, 10 mm outer ring width, mass 3 g. It carries 3.69 kN dynamic and 4.05 kN static load in a 2 mm wall and runs to 22 000 r/min. The cup presses into a 12 mm housing bore, the shaft is the inner raceway, and where the shaft cannot be hardened the matching inner ring IR 5X8X12 takes over the raceway. GCr15 rollers, steel cage, P0/P6, from 100 pieces.
HK0810 Specifications
| Designation | HK0810 |
| Type | Drawn cup needle roller bearing, open both ends, caged |
| Bore diameter Fw | 8 mm |
| Outside diameter D | 12 mm |
| Outer ring width C | 10 mm |
| Corner radius r1,2 min | 0.4 mm |
| Dynamic load rating Cr | 3.69 kN |
| Static load rating C0r | 4.05 kN |
| Fatigue load limit Pu | 0.44 kN |
| Reference speed | 19 000 r/min |
| Limiting speed | 22 000 r/min |
| Mass | 0.003 kg (3 g) |
| Outer ring | Cold-rolled steel cup, case hardened |
| Rollers | GCr15 (100Cr6), ground, gauge-sorted |
| Cage | Steel |
| Tolerance class | P0 standard, P6 on request |
| Shaft requirement | 58–62 HRC, Ra ≤ 0.2 µm, h5/h6 |
| Housing bore | N7 press fit |
| Operating temperature | −30 °C to +120 °C (grease-dependent) |
| Matched inner ring | IR 5X8X12 (shaft becomes 5 mm) |
| Matched seal | G 8X12X3 |
| MOQ | 100 pcs |
8 mm and 10 mm Bore — 17 Variants in One Table
| Designation | Type | Fw (mm) | D (mm) | C (mm) | Cr (kN) | C0r (kN) | Pu (kN) | Speed ref / limit | Mass (kg) |
|---|---|---|---|---|---|---|---|---|---|
| HK 0808 | HK | 8 | 12 | 8 | 2.7 | 2.75 | 0.285 | 19 000 / 22 000 | 0.0027 |
| HK 0810 | HK | 8 | 12 | 10 | 3.69 | 4.05 | 0.44 | 19 000 / 22 000 | 0.003 |
| HK 0810 RS | RS | 8 | 12 | 10 | 2.7 | 2.75 | 0.285 | — / 13 000 | 0.003 |
| HK 0810.2RS | 2RS | 8 | 12 | 10 | 2.3 | 2.04 | 0.208 | — / 13 000 | 0.0032 |
| BK 0808 | BK | 8 | 12 | 8 | 2.7 | 2.75 | 0.285 | 19 000 / 22 000 | 0.0027 |
| BK 0810 | BK | 8 | 12 | 10 | 3.69 | 4.05 | 0.44 | 19 000 / 22 000 | 0.0034 |
| HK 0812 RS | RS | 8 | 12 | 12 | 3.69 | 4.05 | 0.44 | — / 13 000 | 0.0031 |
| HK 0812.2RS | 2RS | 8 | 12 | 12 | 2.7 | 2.75 | 0.285 | — / 13 000 | 0.0033 |
| HK 1010 | HK | 10 | 14 | 10 | 4.29 | 5.3 | 0.57 | 18 000 / 20 000 | 0.0041 |
| HK 1012 | HK | 10 | 14 | 12 | 5.39 | 6.95 | 0.78 | 18 000 / 20 000 | 0.0048 |
| HK 1015 | HK | 10 | 14 | 15 | 6.6 | 9 | 1.02 | 18 000 / 20 000 | 0.006 |
| HK 1012.2RS | 2RS | 10 | 14 | 12 | 3.19 | 3.55 | 0.365 | — / 12 000 | 0.0043 |
| HK 1014.2RS | 2RS | 10 | 14 | 14 | 4.29 | 5.3 | 0.57 | — / 12 000 | 0.0046 |
| BK 1010 | BK | 10 | 14 | 10 | 4.29 | 5.3 | 0.57 | 18 000 / 20 000 | 0.0043 |
| BK 1012 | BK | 10 | 14 | 12 | 5.39 | 6.95 | 0.78 | 18 000 / 20 000 | 0.005 |
| BK 1012 RS | BK RS | 10 | 14 | 12 | 4.29 | 5.3 | 0.57 | — / 12 000 | 0.0043 |
| HN 1010 | HN | 10 | 14 | 10 | 6.82 | 11.4 | 1.27 | 14 000 / 18 000 | 0.0046 |
Two bore sizes, five types. The capacity spread inside a single 12 × 10 envelope runs from 2.3 kN to 3.69 kN depending on sealing, so the type matters as much as the size.
Six Versions of the 8 mm Bore
| Designation | Type | D × C (mm) | Cr (kN) | C0r (kN) | Limiting speed | Mass (kg) | Choose it when |
|---|---|---|---|---|---|---|---|
| HK0810 | open | 12 × 10 | 3.69 | 4.05 | 22 000 | 0.003 | Baseline: maximum capacity, no seal drag |
| HK0810 RS | seal one side | 12 × 10 | 2.7 | 2.75 | 13 000 | 0.003 | Dirty side, still 27% capacity at moderate speed |
| HK0810.2RS | sealed both sides | 12 × 10 | 2.3 | 2.04 | 13 000 | 0.0032 | Grease for life, lowest capacity in the family |
| BK0810 | closed one end | 12 × 10 (C1 8.4) | 3.69 | 4.05 | 22 000 | 0.0034 | Shaft ends inside the housing |
| HK0812 RS | wide, one seal | 12 × 12 | 3.69 | 4.05 | 13 000 | 0.0031 | Full capacity despite the seal, 2 mm wider |
| HK0812.2RS | wide, sealed both sides | 12 × 12 | 2.7 | 2.75 | 13 000 | 0.0033 | Sealed and still 2.7 kN |
The seal penalty is the number most buyers underestimate: HK0810 carries 3.69 kN, the single-seal RS version 2.7 kN (−27%), the double-seal 2RS 2.3 kN (−38%), and limiting speed drops from 22 000 to 13 000 r/min. If your duty needs both sealing and capacity, go to HK0812 RS — same 12 mm OD, 2 mm wider, and the seal costs nothing because the extra width carries more rollers.
Reading the Numbers
| Symbol | Value | What it means in your design |
|---|---|---|
| Cr | 3.69 kN | Dynamic rating at 1 million revolutions — the number to use for L10 life |
| C0r | 4.05 kN | Static rating — governs standstill load, shock and press-fit stress |
| Pu | 0.44 kN | Fatigue limit — below this load the life curve is flat |
| 19 000 / 22 000 r/min | — | Reference and limiting speed; at this size grease life usually binds first |
| 2 mm wall | — | A 608 ball bearing needs 22 mm OD for an 8 mm bore; this delivers 3.69 kN inside 12 mm |
An 8 mm shaft running directly in HK0810 gives roughly the load capacity of a much larger ball bearing, at the cost of axial location and stiffness. That trade is why this size dominates printer, power-tool and small gearbox designs.
Typical Applications
| Application | Position | Why HK0810 |
|---|---|---|
| Printers and copiers | Feed and registration rollers | 12 mm OD, quiet, low friction torque |
| Power tools | Armature and gearbox pinions | Runs on a hardened 8 mm shaft |
| Small gearboxes and actuators | Idler and planet pins | High capacity in a 12 mm bore |
| Pumps and fans | Shaft support | Press fit, no seat machining |
| Office and vending equipment | Cam and lever pivots | Low cost, interchangeable |
| Hobby, RC and fishing reels | Gearbox and handle shafts | Very low mass, 3 g |
Shaft, Housing and Installation
- Shaft: 58–62 HRC, ground to Ra ≤ 0.2 µm, h5/h6. The shaft is the raceway — a turned shaft will Brinell.
- Housing: N7 press fit, R7 for thin-wall aluminium; chamfer 0.3 × 20°; bore depth at least 10 mm plus clearance.
- Press on the stamped face with a flat arbor — never load the cage or a seal lip.
- Sealing: G 8X12X3 lip seal, or specify RS / 2RS and accept the capacity and speed penalty above.
- Lubrication: grease fill 20–25% of free space; oil above 15 000 r/min.
- Alignment: bore and shaft concentric within the supporting bearing's clearance — a drawn cup locates radially only.
Quality Control on Every Batch
- 100% dimensional check on Fw, D and C, with SPC record per lot
- Case depth and hardness verified on the cup
- Roller sorting to 1 µm gauge classes
- Rotation torque and noise sampled per lot
- Seal drag checked on every RS / 2RS lot
- Material certificate 3.1 and inspection report with the shipment
Packing, MOQ and Delivery
10 pcs per bag, 2 000 per carton, cartons on a pallet or in a plywood case. MOQ is 100 pcs for stock sizes. Stock ships in 3–7 days; production orders 20–30 days. Air, sea LCL and FCL available.
Frequently Asked Questions
What are the dimensions of HK0810?
8 mm bore (Fw), 12 mm outside diameter, 10 mm outer ring width and 3 g mass.
What is the load rating of HK0810?
Dynamic 3.69 kN, static 4.05 kN and a fatigue load limit of 0.44 kN.
How much capacity does the sealed version lose?
HK0810 carries 3.69 kN; HK0810 RS carries 2.7 kN (−27%) and HK0810.2RS 2.3 kN (−38%). Limiting speed falls from 22 000 to 13 000 r/min.
How fast can HK0810 run?
Reference speed 19 000 r/min and limiting speed 22 000 r/min in oil or with a suitable grease.
Does HK0810 need an inner ring?
Only if the shaft cannot be hardened to 58–62 HRC. The matching inner ring is IR 5X8X12, which makes the running shaft diameter 5 mm inside the same 12 mm housing.
Which brands interchange with HK0810?
HK0810 is a standardized metric designation and interchanges with the same code from INA/FAG, SKF, NTN, NSK and Koyo.
Need HK0810, or the sealed version?
Tell us the shaft hardness, whether you need sealing, and the quantity — we reply with price, lead time and a drawing within 24 hours on working days.