KOYO

The KOYO FCB series uses three rows of rollers, while the FC series uses a single row. For example, the FCB-12 has a 12 mm bore, 18 mm OD, and 26 mm overall width with three rows, whereas the FC-10 has a 10 mm bore, 16 mm OD, and 12 mm overall width with one row. Both are single-direction, open-design, metric assemblies. The FCB series generally provides higher torque capacity for a given bore size due to the additional roller rows, while the FC series offers a more compact axial width. Selection depends on load requirements and available space.

3G Electric supplies KOYO single-direction needle roller clutch and bearing assemblies with bore diameters from 10 mm to 30 mm and outer diameters from 14 mm to 37 mm. Specific models include FC-10 (10 mm bore, 16 mm OD), FCL-10-K (10 mm bore, 14 mm OD), FCB-12 (12 mm bore, 18 mm OD), FC-16 (16 mm bore, 22 mm OD), FCB-16 (16 mm bore, 22 mm OD), FCB-25 (25 mm bore, 32 mm OD), FC-30 (30 mm bore, 37 mm OD), and FCB-30 (30 mm bore, 37 mm OD). Overall widths range from 12 mm to 30 mm. These metric sizes cover common industrial applications.

KOYO needle roller clutch and bearing assemblies are used for overrunning, indexing, and backstopping in industrial machinery. Typical applications include conveyors, packaging machines, and power transmission systems where one-way rotation or intermittent motion is required. The compact radial cross-section allows installation in space-constrained housings. The open configuration permits lubrication access and integration with existing lubrication systems. These assemblies combine radial bearing support and clutch action in a single unit, which can simplify design and reduce part count. They are not intended for continuous slip or high-speed overrunning without appropriate lubrication and cooling.

KOYO needle roller clutch and bearing assemblies are constructed from alloy steel. The rollers and raceways are hardened to provide wear resistance and load capacity. The open design means the assembly does not include seals or shields, so lubrication and contamination control depend on the surrounding installation. For specific material and heat-treatment details, consult the KOYO catalog or contact 3G Electric with the exact model number. Material specifications are consistent with standard metric bearing practices for industrial applications.

Selection depends on bore size, load torque, speed, and available space. Start by identifying the shaft diameter and housing bore, which determine the required bore and outer diameter. Then determine the torque requirement: the FCB series with three rows generally provides higher torque capacity than the single-row FC series for the same bore. Check the overall width to ensure fit. Consider the direction of rotation and whether the clutch will be used for overrunning, indexing, or backstopping. For assistance, provide the application details and existing part number to 3G Electric for a model recommendation.

3G Electric provides product specifications, model selection assistance, and quotation services for KOYO needle roller clutch and bearing assemblies. The company can help match existing part numbers, confirm dimensions, and coordinate global logistics. Technical support is limited to the information available in manufacturer catalogs and product data; 3G Electric does not perform application engineering or custom design. For detailed engineering analysis, consult KOYO or a qualified engineer. 3G Electric's role is to supply genuine KOYO products with accurate part identification and responsive service.