BK2016 Drawn Cup Needle Roller Bearing — 20 × 26 × 16 mm, Closed End

BK2016 Specifications

What the Closed End Buys You

• Caps the shaft. The cup bottom stops the shaft at a fixed axial position, so you delete the end plug, the circlip or the shoulder that would otherwise do that job.
• Retains grease. Grease stays in the roller path instead of migrating out of the open end — useful on vertical shafts and in gearboxes where splash lubrication is unreliable.
• Excludes dirt. One less opening means one less path for dust and swarf, which is why BK types appear on the dirty side of pump and drive-end positions.
• No through-shaft needed. Where the shaft terminates inside the housing, BK is the natural fit; HK would leave the shaft end unsupported and exposed.
• Same envelope as HK2016. Identical 26 mm OD and 16 mm width, so a design can switch from HK to BK without touching the housing bore.

Reading C and C₁

C₁ is the number to use when you check how far the shaft can enter, or when you size a shoulder that must clear the cup bottom. If your drawing only specifies C = 16 mm, verify the 13.3 mm C₁ against the shaft insertion depth before releasing the housing bore.

BK2016 and Its Neighbours

Typical Applications

Shaft, Housing and Installation

• Shaft: 58–62 HRC, ground to Ra ≤ 0.2 µm, h5/h6 (g6 for a sliding fit). If it cannot be hardened, add inner ring LR/IR 17X20X16.5.
• Housing: N7 press fit, R7 for thin-wall housings; bore depth must clear C₁ 13.3 mm plus a small clearance.
• Installation: press with a flat-faced arbor on the closed face — never transmit force through the open end or the cage. Maximum 120 °C.
• Orientation: the closed face goes outboard, towards the shaft end.
• Sealing: the matching seal for this size is G/SD 20X26X4 where the housing needs an external lip seal.

Quality Control on Every Batch

• 100% dimensional check on F_w, D, C and C₁, with SPC record per lot
• Hardness and case depth verified on the cup and rollers
• 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, 500–1 000 pcs per carton, cartons on a pallet or in a plywood case. MOQ is 100 pieces for stock sizes. Stock ships in 3–7 days; production orders 20–30 days. Air, sea LCL and FCL available, and shipping on your forwarder account is fine.

Frequently Asked Questions

What are the dimensions of BK2016?

20 mm bore (F_w), 26 mm outside diameter, 16 mm outer ring width, closed-end depth C₁ 13.3 mm and 22 g mass.

What does "closed end" mean on BK2016?

The outer cup has a bottom on one side. It caps the shaft end, retains grease and excludes dirt, replacing a separate plug, circlip or shoulder.

What is the difference between BK2016 and HK2016?

Same 20 mm bore, 26 mm OD, 16 mm width and identical load ratings. BK2016 is closed at one end (C₁ 13.3 mm); HK2016 is open at both ends and needs the shaft to pass through.

What is the load rating of BK2016?

Dynamic 12.3 kN, static 20.4 kN and a fatigue load limit of 2.36 kN. For more capacity in the same envelope, use HN2016 at 16.8 kN.

How fast can BK2016 run?

Reference speed 12 000 r/min and limiting speed 14 000 r/min. Sealed versions of the same size run lower, so confirm the duty point with our engineers.

Does BK2016 need an inner ring?

Only if the shaft is softer than 58 HRC or cannot be ground. The matching inner ring is LR/IR 17X20X16.5.

Which brands interchange with BK2016?

BK2016 is a standardized metric designation and interchanges with the same code from INA/FAG, SKF, NTN, NSK and Koyo.