B8-23D
B8-23D Alternator Bearing 8×23×14
- Size
- 8 × 23 × 14 mm
- Cross-ref
- WAI 10-800-4PFI B8-23DAssembly A3TG0081; A3TG0081A; A3TG0091; A3TG0091A
Product line · Alternator & starter
Alternator Bearings
High-speed, low-noise bearings for automotive alternators and starter motors.
- 71 catalog models
- Z3V3 noise grade
- 1,004 h endurance tested
- Smooth OD · EC · NP structures
Quality system
IATF 16949:2016 certified
- MOQ
- 1000 pcs / model
- Lead time
- 30-45 days
- Shipping
- FOB Ningbo / Shanghai
- Response
- Reply within 12 hours
Searches OTT part numbers, OE numbers and SKF / FAG / KOYO / NTN / NSK / SNR cross-references.
No listed model matches . OTT also builds to OE number and drawing — send us this part number.Detailed models
Alternator & starter bearings with full specifications — 22 models
Open a model for dimensions, seal type, speed rating and alternator assembly references.
B10-27D
B10-27D Alternator Bearing 10×27×14
- Size
- 10 × 27 × 14 mm
- Cross-ref
- WAI 10-900-4WPFI B10-27DAssembly LR170746; LR170746B; LR170746C; LR170746E
B10-50D
B10-50D Alternator Bearing 10×27×11
- Size
- 10 × 27 × 11 mm
- Cross-ref
- WAI 10-1050-4PFI B10-50DAssembly LR160-728; LR160-728B; LR160-728C; LR160-728E
SA6202-2RSM
SA6202-2RSM Alternator Bearing 15×35×11
- Size
- 15 × 35 × 11 mm
- Cross-ref
- WAI 6-202-4PFI 6202-2RS C3
SA6303-2RSM
SA6303-2RSM Alternator Bearing 17×47×14
- Size
- 17 × 47 × 14 mm
- Cross-ref
- WAI 6-303-4PFI 6303-2RS C3
62202-2RS
62202-2RS Alternator Bearing 15×35×14
- Size
- 15 × 35 × 14 mm
- Cross-ref
- PFI 62202-2RS C3Assembly Marelli: 63300905
62303-2RS
62303-2RS Alternator Bearing 17×47×19
- Size
- 17 × 47 × 19 mm
- Cross-ref
- WAI 6-2303-4PFI 62303-2RS C3
NB101
OTT NB101 Needle Roller Bearing
- Cross-ref
- OE Reference Ford D2OZ-10A304-A; Ford D4HZ-10A304-A; Land Rover RTC5047; Land Rover RTC5926; Chrysler 2095037; Delco 1957004Cross Reference PFI: NB-101; SKF: 491573; FAG / INA: F-45853; BCH06604; BCH06604P; BCH06604PR; Cargo: 140120
- Fits
- Radial shaft support; actual position to confirm
NB1620
OTT NB1620 Needle Roller Bearing
- Cross-ref
- OE Reference John Deere JD9858; Caterpillar 311316; Case T40012; Piaggio 202470Cross Reference PFI: NB-1620; FAG / INA: SCH1620; Koyo: BH-1620; NSK: VSH1620; Torrington: BH-1620
- Fits
- Radial shaft support; actual position to confirm
6201-2RS
6201-2RS Alternator Bearing
- Size
- 12 × 32 × 10 mm
- Cross-ref
- Fits European, Japanese, American alternators
- Fits
- Alternators
B15-69D-2RS
B15-69D-2RS Alternator Bearing
- Size
- 15 × 35 × 13 mm
- Cross-ref
- OEM 949100-2790, (279)Replaces 100211-2030, 100211-2140
- Fits
- Acura alternators
6001-2RS
6001-2RS Starter Motor Bearing
- Size
- 12 × 28 × 8 mm
- Cross-ref
- Fits Bosch, Hitachi, John Deere, NippondensoOEM 1-900-905-103, 900-905-164
- Fits
- Gear reduction starters
6304-2RS
6304-2RS Alternator Bearing
- Size
- 20 × 52 × 15 mm
- Cross-ref
- Fits CAV, Lucas, Rolls RoyceOEM W02X-12 6304 ZZReplaces 1260A288, 1260A030
- Fits
- Heavy-duty alternators
Structure codes
Bearing Prefix & Structure Codes
- No prefix
- Smooth outer diameter — standard press fit into alternator housing
- EC
- Two nylon expansion rings on OD — expansion fit for housings with wider tolerance
- NP
- Eccentric retaining groove machined on OD + snap ring — locks axially in alternator housing
Example: B15-69D = smooth OD · ECB12-85D = expansion rings · NPB15-83D = groove + snap ring
Full catalog
Complete Bearing Specifications
Dimensions in mm · Load ratings in N · Speed in rpm
| Model | DT (sealed variant) | d | D | B | r min | Cr (N) | Cor (N) | RPM Grease | RPM Contact | RPM Oil |
|---|---|---|---|---|---|---|---|---|---|---|
| B8-74D | NPB8-74D-2RS | 8 | 22 | 11 | 0.3 | 3,350 | 1,370 | 32,000 | 28,000 | 37,000 |
| B8-79D | B8-79D-2RS | 8 | 23 | 11 | 0.3 | 3,910 | 1,530 | 34,000 | 30,000 | 40,000 |
| B8-79D | NPB8-790-2RS | 8 | 23 | 11 | 0.3 | 3,910 | 1,530 | 34,000 | 30,000 | 40,000 |
| B8-79D | ECB8-79D-2RS | 8 | 23 | 11 | 0.3 | 3,910 | 1,530 | 34,000 | 30,000 | 40,000 |
| B8-85D | B8-85D-2RS | 8 | 23 | 14 | 0.3 | 3,910 | 1,530 | 34,000 | 30,000 | 40,000 |
| B8-85D | NPB8-85D-2RS | 8 | 23 | 14 | 0.3 | 3,910 | 1,530 | 34,000 | 30,000 | 40,000 |
| B8-23D | ECB8-85D-2RS | 8 | 23 | 14 | 0.3 | 3,910 | 1,530 | 34,000 | 30,000 | 40,000 |
| B10-46D | NPB10-46D-2RS | 10 | 23 | 11 | 0.3 | 2,700 | 1,270 | 33,000 | 23,000 | 38,000 |
| 6000TT | EC6000-2RS | 10 | 26 | 8 | 0.3 | 4,570 | 1,970 | 30,000 | 22,000 | 36,000 |
| 62000-2RS | 62000-2RS | 10 | 26 | 10 | 0.3 | 4,570 | 1,970 | 30,000 | 22,000 | 36,000 |
| B10-51D | B10-50D-2RS | 10 | 27 | 11 | 0.3 | 4,570 | 1,970 | 30,000 | 22,000 | 36,000 |
| B10-50D | ECB10-50D-2RS | 10 | 27 | 11 | 0.3 | 4,570 | 1,970 | 30,000 | 22,000 | 36,000 |
| B10-50D | NPB10-50D-2RS | 10 | 27 | 11 | 0.3 | 4,570 | 1,970 | 30,000 | 22,000 | 36,000 |
| B10-27D | ECB10-27D-2RS | 10 | 27 | 14 | 0.3 | 4,570 | 1,970 | 30,000 | 22,000 | 36,000 |
| 6200E4-2RS | 6200E4-2RS | 10 | 30 | 9 | 0.6 | 5,100 | 2,390 | 25,000 | 18,000 | 30,000 |
| EC6001-2RS | EC6001-2RS | 12 | 28 | 8 | 0.3 | 5,100 | 2,370 | 26,000 | 18,000 | 30,000 |
| 6201-2RS | 6201-2RS | 12 | 28 | 10 | 0.3 | 5,100 | 2,370 | 26,000 | 18,000 | 30,000 |
| EC6201-2RS | EC6201-2RS | 12 | 32 | 10 | 0.6 | 6,800 | 3,050 | 22,000 | 16,000 | 26,000 |
| NP6201-2RS | NP6201-2RS | 12 | 32 | 10 | 0.6 | 6,800 | 3,050 | 22,000 | 16,000 | 26,000 |
| B12-57D | NPB12-57D-2RS | 12 | 32 | 13 | 0.6 | 6,800 | 3,050 | 22,000 | 16,000 | 26,000 |
| 62201-2RS | 62201-2RS | 12 | 32 | 14 | 0.6 | 6,800 | 3,050 | 22,000 | 16,000 | 26,000 |
| B12-53D | B12-53D-2RS | 12 | 40 | 10 | 0.6 | 7,690 | 3,830 | 20,000 | 14,000 | 24,000 |
| B12-79D | B12-79D-2RS | 12 | 40 | 10/14 | 0.6 | 9,550 | 4,800 | 18,000 | 19,000 | 21,000 |
| B12-40D | B12-40D-2RS | 12 | 40 | 12 | 1 | 9,700 | 4,200 | 20,000 | 15,000 | 24,000 |
| 12BC04S3 | 12BC04S3-2RS | 12 | 42 | 10 | 0.6 | 9,550 | 4,800 | 18,000 | 10,000 | 21,000 |
| 83B880 | 83B880-2RS | 13 | 30 | 8 | 0.3 | 5,100 | 2,370 | 26,000 | 18,000 | 30,000 |
| 6203d14-2RS | 6203d14-2RS | 14 | 40 | 12 | 0.6 | 9,550 | 4,800 | 17,000 | 12,000 | 20,000 |
| 366 | 366-2RS | 15 | 32 | 11 | 0.3 | 5,600 | 2,840 | 23,000 | 14,000 | 28,000 |
| 6202TT | EC6202-2RS | 15 | 35 | 11 | 0.6 | 7,750 | 3,570 | 20,000 | 14,000 | 24,000 |
| 279 | B15-69D-2RS | 15 | 35 | 13 | 0.6 | 7,750 | 3,750 | 20,000 | 14,000 | 24,000 |
| B15-69 | NPB15-69D-2RS | 15 | 35 | 13 | 0.6 | 7,750 | 3,750 | 20,000 | 14,000 | 24,000 |
| 62202-2RS | 62202-2RS | 15 | 35 | 14 | 0.6 | 7,650 | 3,750 | 19,000 | 14,000 | 23,000 |
| SC0299ZLU | SC0299ZLU | 15 | 38 | 12 | 0.6 | 7,750 | 3,750 | 20,000 | 14,000 | 24,000 |
| 348 | 348-2RS | 15 | 38 | 19 | 0.6 | 7,750 | 3,750 | 20,000 | 14,000 | 24,000 |
| B15-85D | B15-85D-2RS | 15 | 40 | 14 | 0.6 | 9,550 | 4,800 | 17,000 | 12,000 | 20,000 |
| 319 | 319-2RS | 15 | 43 | 13 | 1 | 11,400 | 5,450 | 17,000 | 13,000 | 20,000 |
| B15-45D | B15-45D-2RS | 15 | 45 | 14 | 1 | 13,580 | 6,590 | 15,000 | 11,000 | 18,000 |
| 336 | 336-2RS | 15 | 46 | 14 | 1 | 13,580 | 6,590 | 15,000 | 11,000 | 18,000 |
| B15-86D | B15-86D-2RS | 15 | 47 | 14 | 1 | 13,580 | 6,590 | 15,000 | 11,000 | 18,000 |
| B15-83D | B15-83D-2RS | 15 | 47 | 18 | 1 | 13,580 | 6,590 | 15,000 | 11,000 | 18,000 |
| 382-2RS | 382-2RS | 15 | 52 | 16 | 1 | 15,930 | 7,875 | 14,000 | 10,000 | 17,000 |
| 6003DW-2RS | 6003DW-2RS | 15.8 | 35 | 10 | 0.3 | 6,000 | 3,250 | 20,000 | 14,000 | 24,000 |
| 6202-16-2RS | 6202-16-2RS | 16 | 35 | 11 | 0.6 | 7,650 | 3,750 | 19,000 | 14,000 | 23,000 |
| 6203-16-2RS | 6203-16-2RS | 16 | 40 | 12 | 0.6 | 9,550 | 4,800 | 18,000 | 13,000 | 21,000 |
| 63003-2RS | 63003-2RS | 17 | 35 | 14 | 0.3 | 6,000 | 3,250 | 20,000 | 15,000 | 24,000 |
| 6203TT | EC6203-2RS | 17 | 40 | 12 | 0.6 | 9,550 | 4,800 | 17,000 | 12,000 | 20,000 |
| 6203/14-2RS | 6203/14-2RS | 17 | 40 | 14 | 0.6 | 9,550 | 4,800 | 18,000 | 13,000 | 21,000 |
| B17-92D | B17-92D | 17 | 42 | 12 | 0.6 | 9,550 | 4,800 | 17,000 | 12,000 | 21,000 |
| B17-107D | B17-107D-2RS | 17 | 47 | 18 | 1 | 13,580 | 6,590 | 15,000 | 11,000 | 18,000 |
| 62303-2RS | 62303-2RS | 17 | 47 | 19 | 1 | 13,600 | 6,650 | 16,000 | 11,000 | 19,000 |
| B17-52D | B17-52D-2RS | 17 | 52 | 15 | 1.1 | 15,930 | 7,875 | 14,000 | 10,000 | 17,000 |
| 333 | 333-2RS | 17 | 52 | 16 | 1.1 | 15,930 | 7,875 | 14,000 | 10,000 | 17,000 |
| B17-99D | B17-99D-2RS | 17 | 52 | 17 | 1.1 | 15,930 | 7,875 | 14,000 | 10,000 | 17,000 |
| B17-116D | B17-116D-2RS | 17 | 52 | 18 | 1.1 | 15,930 | 7,875 | 14,000 | 10,000 | 17,000 |
| 62304-17-2RS | 62304-17-2RS | 17 | 52 | 21 | 1.1 | 15,900 | 7,900 | 14,000 | 10,000 | 17,000 |
| B17-126D | B17-126D-2RS | 17 | 62 | 17.6 | 1.1 | 21,200 | 10,900 | 12,000 | 8,000 | 14,000 |
| B17-127D | B17-127D-2RS | 17 | 62 | 20 | 1.1 | 21,200 | 10,900 | 12,000 | 8,000 | 14,000 |
| 6904DW-2RS | 6904DW-2RS | 18.8 | 37 | 9 | 0.3 | 6,400 | 3,700 | 19,000 | 13,000 | 23,000 |
| 6905d20-2-2RS | 6905d20-2-2RS | 20 | 42 | 9 | 0.3 | 7,050 | 4,550 | 10,000 | 16,000 | 20,000 |
| 63004-2RS | 63004-2RS | 20 | 42 | 16 | 0.6 | 9,400 | 5,000 | 18,000 | 12,000 | 21,000 |
| 6004d2-2RS | 6004d2-2RS | 20 | 42 | 12 | 0.6 | 9,400 | 5,000 | 18,000 | 12,000 | 21,000 |
| EC6204-2RS | EC6204-2RS | 20 | 47 | 14 | 1 | 12,800 | 6,600 | 16,000 | 11,000 | 18,000 |
| B20-122 | B20-122 | 20 | 47 | 16 | 1 | 12,800 | 6,600 | 14,000 | 10,000 | 18,000 |
| 6004DW-2RS | 6004DW-2RS | 20 | 42 | 12 | 0.6 | 9,400 | 5,000 | 18,000 | 12,000 | 21,000 |
| 6204DW-2RS | 6204DW-2RS | 20 | 47 | 14 | 1 | 12,800 | 6,600 | 16,000 | 11,000 | 18,000 |
| 6905d2-2RS | 6905d2-2RS | 25 | 42 | 9 | 0.3 | 7,050 | 4,550 | 10,000 | 16,000 | 20,000 |
| 63305-2RS | 63305-2RS | 25 | 62 | 25.4 | 1.1 | 21,200 | 10,900 | 12,000 | 10,000 | 14,000 |
| B25-139D | B25-139D | 25 | 68 | 18 | 1.1 | 21,200 | 10,900 | 11,000 | 7,500 | 14,000 |
| 6306d25-2RS | 6306d25-2RS | 25 | 72 | 19 | 1.1 | 26,700 | 15,000 | 6,300 | 9,200 | 11,000 |
| 6906d2-2RS | 6906d2-2RS | 30 | 47 | 9 | 0.3 | 7,250 | 5,000 | 14,000 | 10,000 | 17,000 |
| 6302d32-2RS | 6302d32-2RS | 32 | 55 | 13 | 1 | 13,200 | 8,300 | 8,000 | 12,000 | 15,000 |
Page 1
About this product line
About Alternator Bearings
OTT alternator bearings are precision deep groove ball bearings designed for high-speed rotation in automotive electrical systems. Featuring low-noise, low-vibration performance with various seal configurations. Passed 1,004-hour endurance testing by a Russian OEM. Capable of successful cold starts in environments as low as -60°C. Our catalog covers 60+ models with complete OEM cross-reference to Bosch, Hitachi, Mitsubishi, Nippondenso, Delco, and other major alternator manufacturers.
Applications
- Automotive alternators
- Starter motors
- Electric generators
- Small motors
- Gear reduction starters
- Internal fan alternators
Key features
- 01Ultra-low noise and vibration (Z3V3 grade)
- 02High-speed rated for alternator applications
- 03Passed 1,004-hour endurance test
- 04Multiple seal types: 2RS, ZZ, NP, EC
- 05Cold-start capable down to -60°C
- 06Cross-reference to Bosch, Hitachi, Mitsubishi, Nippondenso OEM numbers
- 07100% vibration testing on every bearing
- 08Rubber shielded, double wide, and nylon band options
Manufacturer vs. trader
Why Distributors & OEM Buyers Choose OTT
Factory-direct pricing. No trading company layer. IATF 16949 process control.
| Criteria | OTT (Manufacturer) | Typical Trading Company |
|---|---|---|
| Production | In-house factory — own machines, own workers | Buys from multiple factories, no production control |
| Certification | IATF 16949 + ISO 14001 | May hold ISO 9001 (quality management only) |
| Noise Grade | Z3V3 — 100% vibration tested before shipment | Grade varies by source factory; not always tested |
| Endurance | 1,004-hour continuous test (Russian OEM verified) | No factory-level endurance data available |
| Customization | Custom specs, OEM branding, laser engraving | Limited — depends on source factory cooperation |
| Pricing | Factory cost + margin — no middleman markup | Factory cost + factory margin + trading margin |
| Traceability | Full batch traceability from raw material | Often limited to purchase order level only |
OTT supplies alternator bearings to automotive parts distributors, alternator remanufacturers, and OEM assembly plants in 50+ countries. Request a sample batch to verify quality before placing bulk orders.
Request Wholesale PricingOEM alternator brands
Alternator Brand Coverage
OTT alternator bearings are dimensionally cross-referenced to the major OEM alternator brands. Whether you're sourcing replacements for Bosch, Hitachi, Denso, or Mitsubishi alternators, OTT has the matching bearing size in stock.
Bosch
NC-series, NI-series, F000AL0xxx
6203, 6303, 6201, B15-69D
Hitachi / Denso
LR, LRB, SC series
6201, 6202, 6203, ECB12-85D
Mitsubishi
A2T, A3T, A5T series
6201, 6303, NPB15-83D
Valeo / Lucas
A13, A14, A127 series
6303, 6304, 6201-2RS
Common bearing designations listed. Contact OTT for specific cross-reference by alternator part number.
Business terms
Factory-direct supply, clear terms.
- MOQ
- 1000 pcs
- Samples
- Sample available upon request
- Lead time
- 30-45 days for standard orders
- Payment
- T/T 30% deposit, 70% before shipment; L/C at sight
- Shipping
- FOB Ningbo / Shanghai
- Customization
- OEM branding, custom specs, packaging customizable
Quality system
Certified to the automotive industry's own standard.
- IATF 16949:2016
- ISO 14001:2015
- ISO 45001:2018
- RoHS
- REACH
Reply within 12 hours
Including weekends
What makes OTT alternator bearings different from standard bearings?
OTT alternator bearings are manufactured with tighter tolerances for ultra-low noise and vibration. They undergo 100% vibration testing and are available with specialized greases for high-speed, high-temperature alternator environments. Our bearings passed a rigorous 1,004-hour endurance test conducted by a Russian OEM partner.
What OEM alternators do OTT bearings fit?
OTT alternator bearings fit all major OEM alternator brands including Bosch, Hitachi, Mitsubishi, Nippondenso, Delco, Leece-Neville, Motorola, Lucas, CAV, Ford, and Valeo. Each model includes complete OEM part number cross-reference.
Can OTT alternator bearings handle extreme cold?
Yes. OTT alternator bearings are tested for cold-start capability down to -60°C, making them suitable for Arctic and extreme cold climate applications. This was validated through endurance testing with a Russian OEM partner.
Product lines
Explore other bearing types
Request for quotation
Send us a part number. Get an engineer’s answer.
Share an OE or competitor number, a drawing or target dimensions and your annual volume. Samples available for qualified projects.
- MOQ
- 1000 pcs / model
- Lead time
- 30-45 days for standard orders
- Shipping
- FOB Ningbo / Shanghai