BK1012 BK1012-RS BK101412 Closed End Drawn Cup Needle Roller Bearing 10x14x12mm

1.Product Overview

BK1012, BK1012-RS and BK101412 are metric single-row closed-end drawn cup needle roller bearings without inner ring, all with Fw=10mm needle assembly inner diameter and D=14mm outer diameter, differentiated by total width and sealing structure. BK series features one-piece stamped steel outer cup with integrated closed end cap, perfect for blind bore housings and shaft end positioning without extra retaining rings.

• BK1012: 12mm width open type, no side seal, good heat dissipation for clean dry workshop;
• BK1012-RS: 12mm width single lip RS rubber seal on open side, blocks dust and light moisture for slightly polluted environments;
• BK101412: 12mm extra wide width closed end bearing, larger roller quantity for enhanced radial load capacity.

Stamped steel cage evenly separates dense needle rollers to achieve ultra-high radial load capacity under ultra-thin radial cross-section. Matching shaft surface requires quenching and superfinishing to serve as inner raceway. Only bear pure radial load, widely used for miniature gearboxes, small power tools, textile tension rollers, automation blind bore sliding parts and light agricultural machinery shaft end assemblies with limited radial installation space.

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2.Technical Specifications

Unified Base Parameter

Fw (Needle assembly inner diameter): 10 mm
Outer Diameter D: 14 mm
Structure: Single row closed end drawn cup needle bearing, no inner ring, stamped steel cage
Material: Drawn cup & needle rollers GCr15 high-carbon chrome bearing steel
Reference grease limiting speed: 18000 r/min
Oil lubrication limiting speed: 20000 r/min
Required shaft hardness: HRC60–64 with mirror superfinishing

BK1012

Total Width C: 12 mm
Sealing: Open one side, closed end cap on reverse side
Dynamic Load Cr: 5.39 kN
Static Load Cor: 6.95 kN
Net Weight: 0.0041 kg

BK1012-RS

Total Width C: 12 mm
Sealing: Closed end cap + single RS NBR contact rubber seal on open end
Dynamic Load Cr: 5.12 kN
Static Load Cor: 6.70 kN
Net Weight: 0.0043 kg

BK101412

Total Width C: 12 mm thickened roller layout
Sealing: Full closed drawn cup structure without open port
Dynamic Load Cr: 6.15 kN
Static Load Cor: 7.82 kN
Net Weight: 0.0048 kg

Min Chamfer r: 0.4 mm
Complete technical data and dimensional drawings for three models are available upon customer request.

3.Key Advantages

1. Integrated closed end cap design realizes automatic axial positioning in blind bore housings, eliminate separate shaft shoulder, snap ring or end cover parts to cut assembly cost
2. Ultra-slim radial cross-section greatly reduces equipment radial occupied space, ideal for miniaturized compact transmission structural design
3. Three optional versions (open / single RS sealed / wide heavy-load) match different working conditions: clean dry, slightly dusty humid and heavy radial load scenes
4. Dense needle roller arrangement provides outstanding radial load capacity and structural rigidity, stable operation under medium speed and light alternating impact load
5. Thin stamped steel cage guides needle rollers uniformly, low friction loss and smooth rolling performance for long continuous running
6. Customizable options include double-sided 2RS seals, C3 enlarged clearance, stainless steel anti-rust drawn cup, OEM laser marking and special high-temperature grease

Effectively simplify blind bore housing processing and extend service life of shaft-end compact transmission assemblies

4.Applications

This BK1012 / BK1012-RS / BK101412 closed end needle roller bearing set is widely matched for the following compact light industrial equipment:

• Miniature speed reducers, small gearbox shaft end blind bore supporting assemblies
• Handheld power tools, garden mini machinery and light agricultural rotary components
• Textile looms, printing small equipment tension sliding roller units
• Automation miniature linear sliding parts and cam shaft positioning structures
• Small hydraulic valves, micro water pump lightweight rotary sliding assemblies
• Aftermarket replacement spare parts for 10mm closed end drawn cup needle bearing equipment

Ideal multi-option compact heavy radial load bearing solution for blind bore shaft-end industrial transmission equipment

5.Why Choose GQZ Bearing

• 25 years of professional BK series closed end drawn cup needle roller bearing manufacturing experience
• Three models fully interchangeable with international standard BK10 series bearings, consistent dimensional tolerance and load performance
• Rich OEM & ODM customized service for double seal, stainless steel shell and special clearance requirements
• Complete full-process inspection: raw material hardness, drawn cup stamping precision, sealing tightness and dynamic load fatigue testing before delivery
• Professional engineering team provides blind bore housing and matching shaft hardness installation guidance within 24 hours
• Stable mass production capacity with preferential bulk wholesale price for long-term machinery equipment manufacturers

We focus on stable axial positioning performance, long service life and long-term win-win cooperation with global industrial buyers

6.Quality Control

• Raw material chemical composition and surface hardness inspection of GCr15 chrome bearing steel
• Precision deep drawing and edge trimming processing for one-piece closed end outer cup
• Standardized constant temperature heat treatment process to stabilize internal metal stress and improve wear resistance
• Comprehensive performance testing: radial clearance, needle roller arrangement uniformity, dynamic/static load capacity and sealing durability for RS version
• Uniform roller assembly inspection and dimensional re-inspection of three model variants before packaging shipment

Every batch of bearings passes full sampling reciprocating cycle test to guarantee stable heavy radial load operation in blind bore housings

7.Get a Quote Now

If you need high-quality BK1012 open, BK1012-RS single sealed and BK101412 heavy-load closed end drawn cup needle roller bearings for miniature gearbox and power tool equipment, send your inquiry to us directly.
You will receive full professional supporting services after submitting inquiry:

• Fast official factory quotation reply within 24 hours
• One-on-one blind bore housing & matching shaft hardness parameter guidance by bearing engineers
• Customized bearing solution suggestions including double RS sealed variants and stainless steel drawn cup options
• Competitive direct factory bulk wholesale price for mixed three-model bulk orders

Send your required quantity of each model and equipment working environment to obtain detailed formal offer

8.FAQ

Q1: What does suffix RS stand for in BK1012-RS?
A1: RS means single-lip NBR contact rubber seal mounted on the open side of closed end bearing to block dust and moisture.

Q2: What’s the difference between BK1012 and BK101412?
A2: Same Fw and outer diameter; BK101412 adopts thickened dense needle layout to upgrade radial dynamic & static load rating for heavy-load working conditions.

Q3: Can BK series bearings work without hardened shaft?
A3: Not recommended. The shaft contact surface must reach HRC60–64 quenching hardness and mirror finish to act as inner raceway and avoid rapid wear.