LRT253020 FONKIN

Needle Roller and Cage Assembly LRT253020 FONKIN

FONKIN LRT253020 is a precision-engineered, thin-section needle roller bearing without an inner ring, designed for high radial load capacity in space‑limited installations. Fully compliant with ISO 3245 dimensional standards, this bearing provides exceptional rigidity, low friction, and stable rotational performance, making it a preferred choice for compact mechanical transmission systems.

Industry Expertise
Global Reach
OEM/ODM Services

Product Introduction
Detailed Parameters
Message Us

FONKIN LRT253020 is a precision-engineered, thin-section needle roller bearing without an inner ring, designed for high radial load capacity in space‑limited installations. Fully compliant with ISO 3245 dimensional standards, this bearing provides exceptional rigidity, low friction, and stable rotational performance, making it a preferred choice for compact mechanical transmission systems.
Dimension Parameters
Inner diameter (d): 25 mm; Outer diameter (D): 30 mm; Width (B): 20 mm; Minimum chamfer radius (rmin): 0.3 mm; Tolerance class: ISO P0 (ABEC 1); Dynamic radial load rating (Cr): 10.2 kN; Static radial load rating (C0r): 14.5 kN; Limiting speed (grease lubrication): 7,500 rpm; Weight: 0.042 kg.
Material Specification
Rollers and outer ring: GCr15 (100Cr6/AISI 52100) bearing steel, hardness 60–64 HRC, offering high wear resistance, rolling fatigue strength, and dimensional stability. Cage: stamped low-carbon steel with precision forming, ensuring stable roller guidance and low friction. Surface black oxide treatment enhances corrosion resistance and lubricant adhesion.
Manufacturing Process
Key processes include precision cold forming, CNC turning, vacuum heat treatment, high-precision grinding, and raceway superfinishing. Heat treatment ensures uniform hardness and internal stress relief. Superfinishing achieves a surface roughness of Ra ≤ 0.2 μm, reducing friction and improving service life. Full‑automatic assembly and 100% dimensional inspection ensure consistency.
Service Life
Under ISO 281 standard operating conditions (40% rated load, 3,500 rpm, proper lubrication), the rated service life exceeds 6,500 hours. Life is mainly affected by lubrication quality, installation alignment, contamination, and operating temperature.
Applications & Industries
Widely used in small gearboxes, electric tools, textile machinery, packaging equipment, automotive actuators, and precision transmission components. It serves industries including automotive, machine tools, automation, textile, and packaging machinery, favored for its thin cross-section, high load density, and suitability for restricted radial spaces.
Maintenance
Lubricate with NLGI 2 lithium complex grease, filling 30–40% of internal free space. Relubricate every 500–600 operating hours. Keep the working environment clean and dust‑free. Inspect temperature, noise, and vibration monthly; replace immediately if overheating, abnormal sound, or excessive clearance occurs.
Installation
Clean the housing bore and shaft before installation; check dimensional accuracy. Use a press to mount the outer ring evenly without impact. Shaft hardness should be at least 58 HRC. Alignment error must be controlled within 0.02 mm TIR. After installation, rotate manually to verify smooth operation and conduct a one‑hour test run.FONKIN LRT253020 is a high-performance thin-section needle roller bearing optimized for compact high-load mechanical systems, delivering reliable performance, long service life, and cost-effective operation for industrial and automotive applications.

BRAND	FONKIN/SKF/FAG/INA/NSK/NTN/TIMKEN/SNR/IKO/KOYO/ASAHI/FYH/THK/HIWIN/PMI/TORRNGTON
BEARINGS NO.	LRT253020 FONKIN
TYPE	Needle Roller and Cage Assembly
Inner(d)mm	25
Outer(D)mm	30
Width(B)mm	20.5
WEIGHT/KG	0.034
EAN CODE

Tel

+86-510-6831-3099

E-mail

fonkin-industries@188.com

Address

No.105, Huixin Road,Yuqi Industrial Park, Huishan District, hunqi Road, Yuqi Town, Wuxi, Jiangsu Province, P.R.CHINA

All the fields are required. By sending the form you agree to the Terms & Conditions