INA F-202808.03.NUP is a single-row cylindrical roller bearing (NUP design) engineered by Schaeffler Group for high-load, high-precision industrial powertrain and transmission applications. Optimized for radial load capacity, axial guidance, and extended service life, this bearing delivers superior performance in automotive, construction machinery, and machine tool systems.
Industry Expertise
Global Reach
OEM/ODM Services
Product Introduction
Detailed Parameters
Message Us
INA F-202808.03.NUP is a single-row cylindrical roller bearing (NUP design) engineered by Schaeffler Group for high-load, high-precision industrial powertrain and transmission applications. Optimized for radial load capacity, axial guidance, and extended service life, this bearing delivers superior performance in automotive, construction machinery, and machine tool systems.
Bore diameter (d): 50 mm (tolerance: h5, −0.008/+0 mm)
Outer diameter (D): 90 mm (tolerance: H6, 0/+0.019 mm)
Width (B): 27 mm (tolerance: ±0.05 mm)
Chamfer (rmin/rmax): 1.1 mm / 1.5 mm
Weight: 0.5 kg
Precision class: P6 (ISO 492 standard), ensuring low radial runout ≤ 0.006 mm
Clearance: CN (normal internal clearance, ISO 5753)
Inner/outer rings: High-carbon chromium bearing steel 100Cr6 (AISI 52100). Hardness: 60–64 HRC; high wear resistance, fatigue strength, and dimensional stability under heavy loads.
Rollers: 100Cr6 (AISI 52100) precision cylindrical rollers. Surface hardness: 61–65 HRC; uniform load distribution and minimal friction.
Cage: Glass-fiber reinforced polyamide 66 (PA66-GF30). Temperature resistance: −30 °C to +120 °C; lightweight, low friction, and excellent roller guidance.
Hot forging: Precision die forging for dense grain structure and high mechanical strength.
CNC turning: High-precision machining to achieve dimensional accuracy ≤ ±0.003 mm.
Heat treatment: Vacuum hardening + low-temperature tempering for uniform hardness, minimal distortion, and enhanced fatigue life.
Grinding: Multi-stage surface grinding (raceway roughness Ra ≤ 0.2 μm).
Superfinishing: Honing process for raceway and roller surfaces (Ra ≤ 0.05 μm), reducing friction and improving lubrication retention.
Standard rating life (L10): 8,000–12,000 hours under ISO 281:2007 standard conditions (radial load 70% of Cr, 1,500 rpm, clean oil lubrication).
Basic dynamic load rating (Cr): 68.5 kN; basic static load rating (C0r): 62.8 kN.
Key life factors: Load magnitude, lubrication quality, contamination, operating temperature, and alignment accuracy.
Automotive transmissions: Gearboxes, differential assemblies, and electric vehicle (EV) drive systems (high radial load, compact envelope).
Construction machinery: Excavator travel reducers, concrete mixer gearboxes (heavy shock loads, dust resistance).
Machine tools: Spindle gearboxes, feed drives (high precision, low noise, stable running).
Industrial gear units: General-purpose reducers, conveyor drives (continuous heavy-duty operation).
Agricultural equipment: Tractor transmissions, harvester drives (harsh environments, long maintenance intervals).
Lubricant: Mobilith SHC 220 / Shell Gadus S2 V220 2 lithium complex grease (NLGI 2) or ISO VG 68–100 mineral oil.
Regreasing interval: 1,500–2,000 operating hours (continuous operation); 500 hours under heavy contamination.
Grease quantity: 12–15 g (30–40% of internal free space).
Inspection: Check every 500 hours for noise, vibration, temperature (<75 °C), and leakage; clean with petroleum ether if contaminated.
Pre-installation: Clean housing/shaft with isopropyl alcohol; check for burrs, scratches, or corrosion.
Mounting: Use induction heater (80–100 °C) for inner ring; press outer ring with hydraulic press (max force: 50 kN); avoid direct hammering.
Alignment: Radial misalignment ≤ 0.002 mm/100 mm; axial runout ≤ 0.005 mm.
Fastening: Lock nut torque: 85–95 Nm (grade 8.8 bolts).
Post-installation: Rotate manually to confirm smooth operation; measure temperature rise (<30 °C above ambient).
| BRAND | INA/FONKIN/SKF/FAG/NSK/NTN/TIMKEN/ZKL/PEP/KOYO/TSUBAKI |
| BEARINGS NO. | F-202808.03.NUP INA |
| TYPE | Cylindrical Roller Bearing Single Row |
| Inner(d)mm | 50 |
| Outer(D)mm | 90 |
| Width(B)mm | 27 |
| WEIGHT/KG | 0.5 |
| EAN CODE | 4012802706130 |
+86-510-6831-3099
No.105, Huixin Road,Yuqi Industrial Park, Huishan District, hunqi Road, Yuqi Town, Wuxi, Jiangsu Province, P.R.CHINA
Rubber-coated cam followers are specialized rolling elements with a rubber-overmolded outer ring, combining the load-bearing capacity of cam followers...
View More
FONKIN AA45 is a high-precision automotive special bearing, engineered for compact powertrain and auxiliary system installations. Its raceways and rol...
View More
SKF 3314DNRCBM is a double-row angular contact ball bearing with 70mm bore, 150mm outer diameter and 63.5mm width, boasting a 40° contact angle for op...
View More
The 230/630CA/W33 SKF is a spherical roller bearing with an open design. This bearing type has a solid inner ring, which runs on two rows of symmetric...
View More
The NP460743/NP266185 Timken is a single-row tapered roller bearing. This bearing type gets its name from the tapered rollers between the inner and ou...
View More
The 23092CA/W33 SKF is a spherical roller bearing with an open design. This bearing type has a solid inner ring, which runs on two rows of symmetrical...
View More
The SEHB320 is a heavy-duty split plummer block bearing housing, engineered for seamless compatibility with metric-series spherical roller bearings. I...
View More
The BS2-2213-2RS/VT143 SKF is a spherical roller bearing with seals on both sides. This bearing type has a solid inner ring, which runs on two rows of...
View More
29324E is a single - row thrust spherical roller bearing from NTN, a world - class bearing manufacturer. Its rings and rollers are made of high - carb...
View More
The 4T-30205 is a precision tapered roller bearing engineered by NTN, a top global bearing manufacturer. Its inner/outer rings and tapered rollers are...
View More
FAG 20226MB is a single-row spherical roller bearing with metric dimensions: 130mm bore, 230mm outer diameter, 40mm width, and a brass cage for stable...
View More
SKF 29334E is a heavy-duty spherical thrust roller bearing with metric dimensions: 170mm bore, 300mm outer diameter, 73mm width, and a sphered housing...
View More
SKF 33208/Q is a single-row tapered roller bearing with metric dimensions: 40mm bore, 80mm outer diameter, 29mm width, and a 14° contact angle. Its ro...
View More
TIMKEN T169-904A2 is a single - row thrust tapered roller bearing (inch - dimensioned) with bore 43.104mm, OD 82.956mm, width 23.812mm. Rollers and ra...
View More
The INA GE90-SX is a maintenance-free radial spherical plain bearing, boasting a 90mm inner diameter, 130mm outer diameter and 60mm width. Its inner r...
View More
The TSUBAKI MZ45-40 is a precision needle roller bearing with a 45mm inner diameter, 52mm outer diameter and 40mm width. Its rollers and rings are cra...
View More
The TIMKEN 81600/81962 is a single-row tapered roller bearing, consisting of a cup (81962) and cone (81600). It has a bore diameter of 152.4mm, outer ...
View More
The NTN 23138EMW33 is a double-row spherical roller bearing with an inner diameter of 190mm, outer diameter of 320mm and width of 104mm. Its rings and...
View More
The SKF 22213E/C3 is a double-row spherical roller bearing with dimensions 65mm ID, 120mm OD and 31mm width. It’s made of steel for races and rollers,...
View More
ST5183 - 2 is a high - performance tapered roller bearing produced by KOYO. It is made of high - quality chromium bearing steel, which is further enha...
View More
KOYO ST5183-1 is a high-strength tapered roller bearing, composed of a precision-machined cone and cup. It has a bore diameter of 83mm, an outer diame...
View More
FONKIN 8F3170 is a high-performance spherical roller bearing, engineered for heavy-load and misalignment-tolerant applications. It has a robust struct...
View More
TIMKEN 55206C/55437 is a single-row tapered roller bearing assembly, comprising a 55206C cone and a 55437 cup. It has a bore diameter of 52.388mm, out...
View More
TIMKEN JF5049/JF5010 is a single - row tapered roller bearing assembly, consisting of a JF5049 cone and a JF5010 cup. It has a bore diameter of 50mm, ...
View More
TIMKEN 72212C/72487 is a single - cone component of tapered roller bearings, paired with cup 72750 for assembly. It has a bore diameter of 123.825 mm,...
View More
The 23130CC/C3W33 SKF is a spherical roller bearing with an open design. This bearing type has a solid inner ring, which runs on two rows of symm...
View More
+86-137-7105-7666
+86-510-6831-3099
