Wholesale GQZ 7902ATR Open Type Single Row Angular Contact Bearing 15x28x7mm Light Load Micro Rotation Equipment Bearing
- 7902ATR is a slim thin-wall single row angular contact ball bearing with standard dimensions 15×28×7mm, adopting 30° contact angle design and lightweight TR polyamide resin ball-guided cage. The ultra-thin cross-section greatly reduces overall volume to fit compact miniature equipment with limited installation space. As an open-type bearing without sealing, it supports circulating oil lubrication and maintains ultra-high limiting speed with low friction and slight temperature rise during continuous operation. It can bear combined radial load and unidirectional axial load stably; when used in paired DB/DF/DT arrangement, it can also withstand bidirectional axial force. Superfinished raceways and steel balls deliver quiet vibration-free rotation, making it a core precision rotary component widely applied to high-speed miniature precision machinery.
*Send inquiry to get full technical datasheet and factory price of 7902ATR bearing.
| Specification | Value |
|---|---|
| Bearing Model | 7902ATR |
| Bore d | 15 mm |
| Outer diameter D | 28 mm |
| Width B | 7 mm |
| Minimum chamfer r | 0.3 mm |
| Minimum chamfer r1 | 0.15 mm |
| Contact Angle A | 30° |
| Dynamic load Cr | 4.75 kN |
| Static load C0r | 2.53 kN |
| Limiting speed (Grease) | 46600 r/min |
| Limiting speed (Oil) | 56000 r/min |
| Approximate weight | 0.016 kg |
| Cage | TR Polyamide resin ball-guided cage |
| Seal Type | Open without seal |
| Material | GCr15 Chrome Bearing Steel |
| Precision Class | P0 / P6 optional |
| Clearance | Standard clearance, C3 optional |
- Ultra-thin wall slim structure, perfectly match narrow installation space
- 30° contact angle, balanced radial and single-direction axial bearing capacity
- TR polyamide resin cage, light weight, low friction and low heat generation
- Open design, compatible with circulating oil lubrication for ultra-high speed scenarios
- Standard clearance as default, C3 enlarged clearance optional for high-temperature working conditions
- P0 precision standard, P6 high precision grade available on customer request
- Mini high-speed CNC spindles and small precision machining rotary components
- Optical measuring instruments and laboratory precision testing equipment
- Micro high-speed motors, tiny cooling fans and portable rotary devices
- Facial massage beauty tools and cosmetic mini high-speed machinery
- Semiconductor light-duty transmission modules and small automation equipment
- Mini robot joint bearings and lightweight precision transmission devices
- Made of high-purity GCr15 chrome bearing steel with standardized heat treatment to guarantee high hardness and outstanding wear resistance.
- Superfinished inner/outer raceways and steel balls ensure ultra-quiet, smooth high-speed running performance.
- Strict dimensional tolerance inspection to keep consistent precision for thin-wall miniature bearings.
- Abundant spot stock of 7902ATR precision bearings, support small sample orders and fast global bulk delivery.
- Provide OEM laser marking and customized packaging services for wholesale buyers worldwide.
*Contact our technical team to select proper contact angle and duplex arrangement for your equipment.
Q1: Dimensions of 7902ATR?
A1: Bore 15 mm, Outer diameter 28 mm, Width 7 mm.
Q2: What does ATR stand for?
A2: 30° contact angle, TR polyamide resin ball-guided cage.
Q3: Load characteristic?
A3: Mainly bear radial load, support single-direction axial load; pair mounting for bidirectional axial load.
Q4: Lubrication method?
A4: Open structure, suitable for circulating oil lubrication to reach ultra-high speed.
Q5: Precision & clearance options?
A5: P0 standard precision, standard clearance; P6 precision and C3 clearance optional.
*Stable stock for single row angular contact bearings, support fast bulk order shipment.
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