HK1210 Drawn Cup Needle Roller Bearing — 12 × 16 × 10 mm, Open End

HK1210 Specifications

HK Series Size Chart — 18 Standard Sizes

All open-end HK types, F_w 10–30 mm. Sealed versions (HK..RS, HK..2RS) and the heavy-duty HN type use the same envelopes and are quoted on request; the values above are our catalogue figures for the standard open-end type.

Same 12 mm Bore, Seven Different Bearings

The 12 mm bore is the most crowded size in the range — pick by width and sealing, not by bore:

Two practical notes. First, HK1210 and HN1210 share the same 16 × 10 envelope, but HN1210 carries 7.48 kN instead of 4.84 kN — if your load calculation is marginal and you cannot change the housing, HN1210 is the drop-in upgrade. Second, sealed versions drop the speed rating sharply (10 000 r/min against 18 000) because the lip adds drag; do not specify 2RS "for safety" if the shaft really runs fast.

Reading the Load Numbers

The 2 mm wall is why HK1210 exists: a 12 mm bore ball bearing needs roughly 5 mm of radial space, the drawn cup needs 2 mm. What you give up is stiffness and axial location — a drawn cup bearing locates radially only, so plan a shoulder or a circlip elsewhere in the shaft train.

Typical Applications

Shaft, Housing and Installation

• Shaft: 58–62 HRC, ground to Ra ≤ 0.2 µm, h5/h6. The shaft is the inner raceway; a turned or soft shaft will Brinell and the bearing will fail early.
• Housing: N7 press fit, R7 for thin-wall aluminium; bore depth at least 10 mm plus clearance, chamfer 0.3 × 20°.
• Press on the stamped face with a flat arbor — never through the cage or the rollers.
• Cannot harden the shaft? Fit inner ring LR/IR 8X12X10.5; note this reduces the shaft to 8 mm inside the same 16 mm housing.
• Sealing: G 12X16X3 lip seal where the housing face needs external sealing, or specify an RS / 2RS bearing.
• Lubrication: grease fill of 20–30% of the free space, or oil where speed is above 12 000 r/min.

Quality Control on Every Batch

• 100% dimensional check on F_w, D and C, with SPC record per lot
• Case depth and hardness verified on the cup
• Roller sorting to 1 µm gauge classes
• Noise and rotation torque sampled per lot
• Material certificate 3.1 and inspection report with the shipment
• Anti-rust film, individual bag, carton; plywood case for LCL

Packing, MOQ and Delivery

10 pcs per bag, 1 000 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 HK1210?

12 mm bore (F_w), 16 mm outside diameter, 10 mm outer ring width and 4.6 g mass.

What is the load rating of HK1210?

Dynamic 4.84 kN, static 6.4 kN and a fatigue load limit of 0.71 kN.

How fast can HK1210 run?

Reference speed 16 000 r/min and limiting speed 18 000 r/min. Sealed RS and 2RS versions of the same size are rated 10 000 r/min.

HK1210 or HK1212?

Same 12 mm bore. HK1210 is 16 × 10 and carries 4.84 kN; HK1212 is 18 × 12 and carries 6.27 kN. Choose HK1212 when you have 2 mm more radial space and need 30% more capacity; stay with HK1210 when the housing wall is fixed.

Does HK1210 need an inner ring?

No, if the shaft is hardened to 58–62 HRC and ground. For a soft shaft use LR/IR 8X12X10.5 — the shaft diameter then becomes 8 mm inside the same 16 mm housing.

Which brands interchange with HK1210?

HK1210 is a standardized metric designation and interchanges with the same code from INA/FAG, SKF, NTN, NSK and Koyo.