Not every application can be served by standard off-the-shelf needle rollers. When your design calls for an unusual diameter-length combination, a tighter tolerance than G2, a non-standard material, or a custom end profile – you need a manufacturer that can deliver special needle rollers made precisely to your specifications.
We are a dedicated manufacturer of loose needle rollers with extensive experience in producing custom and non-standard dimensions for clients across Europe, North America, and Asia. Our engineering team works closely with customers to develop needle rollers that meet exact application requirements, whether for automotive transmissions, industrial gearboxes, hydraulic systems, or specialized machinery.
In our manufacturing practice, a needle roller is considered "special" when it deviates from standard catalog dimensions or specifications in one or more of the following aspects:
Non-standard diameter or length – any dimension that falls outside our standard stock range (from as small as 0.8 mm diameter to over 30 mm, and lengths from 2 mm to 120 mm). Tighter tolerances – beyond standard G2, G3, G5 grades, we can produce to customer-defined tolerance bands as tight as ±1 micron.
Special materials – beyond standard 100Cr6 (AISI 52100) bearing steel, we offer stainless steel (440C, 316), high-temperature alloys, and ceramic materials for corrosion-resistant or extreme-temperature applications. Custom end configurations – flat end (NRB), round end (NRA), spherical end (NRR), or completely custom end profiles to suit unique mounting or load requirements. Special heat treatment – customized hardness profiles, case depth, or surface finishing specifications.
| ends | Dmmw | Lmmw | maxr1mm min | maxr2mmmin | |||||
| types | 0.5--50 | 1.5--50(DIN-5402) | 0.3-0.8(DIN-5402) | 0.3-1 | |||||
| I-types | NRA | TB | rounded, polished faces, rounded ends | Dw1 mm - 6 mm | |||||
| Ⅱ- types | NRB | TT | flat ends underground (available only from about 5 mm as standard, small diameters on request) | Dw1 mm - 6 mm | |||||
| Ⅲ-types | TR | (RC,ZRO) | standard with polished faces | Dw3mm - 50 mm | |||||
| Ⅳ-types | ZB | TP | no cut face | Dw3mm-50 mm | |||||
| Ⅴ- types | CE | CE | cuspidal enden, cuspidal ends | Dw5mm,50mm | |||||
we are a full-scale manufacturer with complete in-house control over every production step. Our facility is equipped with advanced CNC grinding machines, centerless grinders, heat treatment furnaces, and automated optical inspection systems. This vertical integration allows us to produce special needle rollers with consistent quality, short lead times, and full traceability from raw material to finished product.
All our special needle rollers are manufactured in compliance with ISO 3096:2018 and DIN 5402-3 standards, ensuring they meet international quality requirements regardless of their non-standard dimensions.
Send us your special needle roller specification today and receive a quotation within 24 hours. Whether you need a prototype batch or a large production order, we are here to deliver precision components that meet your exact needs – every time.