English  |
The BK4016 is a premium drawn cup needle roller bearing measuring 40 mm (Fw) × 47 mm (D) × 16 mm (C). Featuring a closed-end design to seal off and protect shaft ends, it offers an exceptionally low cross-section combined with a high static load rating of 38,500 N. Ideal for automotive transmissions, gearboxes, and industrial machinery where radial space is strictly limited. We provide global B2B supply with OEM services, custom packaging, and competitive bulk pricing.
The BK Series Drawn Cup Needle Roller Bearing is engineered with a unique, thin-walled outer ring drawn from high-quality sheet steel. The "BK" designation indicates that one end of the cup is closed, making it perfect for terminating shaft ends while preventing the ingress of dirt and retaining lubricating grease. Despite its extremely low profile, the dense arrangement of needle rollers allows it to support exceptionally high radial loads compared to standard ball bearings of similar sizes.
Ensure precise fitment and load calculation using the engineering data below.
Item | Specification |
Designation | BK4016 |
Under roller diameter (Fw) | 40 mm |
Outer diameter (D) | 47 mm |
Width (C) | 16 mm |
Corner radius (r) | 0.8 mm |
Dynamic load rating (C) | 20,000 N |
Static load rating (C0) | 38,500 N |
Fatigue load limit (Cu) | 5,000 N |
Limiting speed (nG) | 6,600 r/min |
Reference speed (nB) | 5,000 r/min |
Weight | 51 g |
The BK4016 is designed to maximize performance in confined spaces, offering several key advantages for OEM designers and repair facilities:
Space-saving design: With an outer diameter only 7 mm larger than the shaft, it is the ultimate solution for compact housing designs where space and weight (only 51 g) are at a premium.
Closed-end protection: The integrated closed end acts as a built-in seal for the end of a shaft, eliminating the need for separate end caps and preventing grease leakage.
Cost-effective mounting: The thin-walled outer ring is designed to be press-fitted tightly into the housing bore. This interference fit secures the bearing axially and radially, requiring no snap rings or shoulders.
Due to its high radial capacity and compact form factor, the BK4016 is widely used in:
Automotive manual transmissions and transfer cases.
Industrial gearboxes, pumps, and compressors.
Agricultural machinery and power tools.
Two-stroke engines and recreational vehicle axles.
We specialize in bulk supply for machinery manufacturers and aftermarket distributors.
OEM Branding: We can stamp your brand logo or specific part numbers on the closed face of the bearing.
Lubrication: Can be supplied pre-packed with standard lithium grease or specialized high-temp/water-resistant lubricants upon request.
Packaging: Shipped in secure industrial tubes to protect the thin outer rings from deformation during transit, or in custom retail boxes.
Q1: What is the difference between the HK and BK series needle bearings?
A: The HK series is open at both ends, allowing the shaft to pass completely through the bearing. The BK series (like the BK4016) has one end closed, which is used at the end of a shaft to seal the housing and prevent contamination.
Q2: Does the BK4016 include an inner ring?
A: No. Drawn cup needle roller bearings like the BK4016 are typically supplied without an inner ring. The needles run directly on the shaft, which must be hardened (HRC 58-64) and ground to the correct precision to act as the inner raceway. If your shaft cannot be hardened, you must purchase a separate IR (Inner Ring) sleeve.
Q3: How should this bearing be installed?
A: It must be installed using an arbor press and a suitable mounting mandrel. Striking the thin outer cup with a hammer will deform the bearing and cause it to fail. The bearing relies on a tight press-fit in the housing to round out the cup and achieve its final precise dimensions.
The BK Series Drawn Cup Needle Roller Bearing is engineered with a unique, thin-walled outer ring drawn from high-quality sheet steel. The "BK" designation indicates that one end of the cup is closed, making it perfect for terminating shaft ends while preventing the ingress of dirt and retaining lubricating grease. Despite its extremely low profile, the dense arrangement of needle rollers allows it to support exceptionally high radial loads compared to standard ball bearings of similar sizes.
Ensure precise fitment and load calculation using the engineering data below.
Item | Specification |
Designation | BK4016 |
Under roller diameter (Fw) | 40 mm |
Outer diameter (D) | 47 mm |
Width (C) | 16 mm |
Corner radius (r) | 0.8 mm |
Dynamic load rating (C) | 20,000 N |
Static load rating (C0) | 38,500 N |
Fatigue load limit (Cu) | 5,000 N |
Limiting speed (nG) | 6,600 r/min |
Reference speed (nB) | 5,000 r/min |
Weight | 51 g |
The BK4016 is designed to maximize performance in confined spaces, offering several key advantages for OEM designers and repair facilities:
Space-saving design: With an outer diameter only 7 mm larger than the shaft, it is the ultimate solution for compact housing designs where space and weight (only 51 g) are at a premium.
Closed-end protection: The integrated closed end acts as a built-in seal for the end of a shaft, eliminating the need for separate end caps and preventing grease leakage.
Cost-effective mounting: The thin-walled outer ring is designed to be press-fitted tightly into the housing bore. This interference fit secures the bearing axially and radially, requiring no snap rings or shoulders.
Due to its high radial capacity and compact form factor, the BK4016 is widely used in:
Automotive manual transmissions and transfer cases.
Industrial gearboxes, pumps, and compressors.
Agricultural machinery and power tools.
Two-stroke engines and recreational vehicle axles.
We specialize in bulk supply for machinery manufacturers and aftermarket distributors.
OEM Branding: We can stamp your brand logo or specific part numbers on the closed face of the bearing.
Lubrication: Can be supplied pre-packed with standard lithium grease or specialized high-temp/water-resistant lubricants upon request.
Packaging: Shipped in secure industrial tubes to protect the thin outer rings from deformation during transit, or in custom retail boxes.
Q1: What is the difference between the HK and BK series needle bearings?
A: The HK series is open at both ends, allowing the shaft to pass completely through the bearing. The BK series (like the BK4016) has one end closed, which is used at the end of a shaft to seal the housing and prevent contamination.
Q2: Does the BK4016 include an inner ring?
A: No. Drawn cup needle roller bearings like the BK4016 are typically supplied without an inner ring. The needles run directly on the shaft, which must be hardened (HRC 58-64) and ground to the correct precision to act as the inner raceway. If your shaft cannot be hardened, you must purchase a separate IR (Inner Ring) sleeve.
Q3: How should this bearing be installed?
A: It must be installed using an arbor press and a suitable mounting mandrel. Striking the thin outer cup with a hammer will deform the bearing and cause it to fail. The bearing relies on a tight press-fit in the housing to round out the cup and achieve its final precise dimensions.
