K3X5X7-TV Subminiature Needle Roller & Cage Assembly for Drone Gimbals
| Item No : | |
| Size (d*D*B) : | 3x5x7mm |
| Material : | |
| Lead Time : | 3-5 days |
| Weight : | 0.00025KG |
| MOQ : | 500 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The K3X5X7-TV (3 x 5 x 7 mm) is a sub-miniature needle roller and cage assembly engineered specifically for micro-precision drives where structural weight and radial space are exceptionally constrained. Featuring a 3mm inner shaft diameter (Fw), 5mm outer housing bore diameter (Ew), and 7mm width, this self-contained radial unit consists of precision-ground steel needle rollers retained in a lightweight, Glass-Fiber Reinforced Polyamide 66 cage (TV suffix). Designed without inner and outer rings, it utilizes the hardened shaft and housing bore directly as raceways, providing high dynamic load capacity, low rotational inertia, and quiet operation at elevated speeds. We maintain stable warehouse stock of our proprietary RMO brand alongside agile global procurement for premier international bearing brands, serving manufacturers of medical surgical handpieces, micro actuators, drone camera gimbals, and RC servo motors.
⚙️Product Features:
- Lightweight TV Polymer Cage: Glass-fiber reinforced polyamide cage provides superior self-lubricating qualities, reduces vibration, and lowers running noise at high RPM.
- Ringless Sub-Miniature Geometry: Direct raceway contact design yields an ultra-thin 1mm radial section, maximizing shaft rigidity and compacting drive housing dimensions.
- Low Inertia & Fast Acceleration: Low-mass roller and nylon retainer combination drastically minimizes start-up friction and rotational inertia in delicate servo mechanisms.
- Precise Roller Retention: Curved pocket pockets guide micro needle rollers accurately, preventing skidding and skewing during rapid reversing duty cycles.
- Flexible Dual Sourcing: Factory-direct inventory supply from RMO combined with fast procurement channels for premier global needle bearing brands.
⚙️Product Application:
- Medical & Dental Handpieces: Micro turbine drive shafts, high-speed surgical drill handpieces, and automated dosing pumps.
- Precision Robotics & Drones: Drone camera gimbal orientation pivots, robotic gripper joints, and micro linear motor drive screws.
- RC Model Transmissions: High-torque RC steering servos, miniature speed gearboxes, and model helicopter swashplate linkages.
- Smart Home & Office Automation: Electronic lock micro actuators, motorized curtain drive gears, and high-end camera zoom modules.
⚙️Precautions:
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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⚙️Obtain Certificate:
About Rimao
Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.
We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!
⚙️Technical Parameters:
| Bearing Model | |
| Bearing Type | |
| Metric Dimensions | |
| Operating Temperature | -20°C to +120°C |
| Target Machinery | |
| Brand | RMO (Own Brand) / Neutral / OEM Custom / Other Global Brands |
| Package | Individual plastic bag, plastic tube or original RMO brand box |
| Lead Time | 3-5 days for stock; 7-15 days for bulk orders |
| Shipping | Express (DHL/FedEx/UPS), Air Freight, Sea Freight |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
| Model No. | d | D | H | m |
| K3×5×7-TV | 3 mm | 5 mm | 7 mm | 0.3 g |
| K3×5×9-TV | 3 mm | 5 mm | 9 mm | 0.4 g |
| K3×6×7-TV | 3 mm | 6 mm | 7 mm | 0.4 g |
| K4×7×7-TV | 4 mm | 7 mm | 7 mm | 0.5 g |
| K4×7×10-TV | 4 mm | 7 mm | 10 mm | 0.7 g |
| K5×8×8-TV | 5 mm | 8 mm | 8 mm | 0.7 g |
| K5×8×10-TV | 5 mm | 8 mm | 10 mm | 0.9 g |
| KT 587N | 5 mm | 8 mm | 7 mm | 0.53 g |
| K6×9×8-TV | 6 mm | 9 mm | 8 mm | 0.8 g |
| K6×9×10-TV | 6 mm | 9 mm | 10 mm | 1.1 g |
| KT 697N | 6 mm | 9 mm | 7 mm | 0.63 g |
| K6×10×13-TV | 6 mm | 10 mm | 13 mm | 1.9 g |
| K7×9×7-TV | 7 mm | 9 mm | 7 mm | 0.6 g |
| K7×10×8-TV | 7 mm | 10 mm | 8 mm | 0.9 g |
| K7×10×10-TV | 7 mm | 10 mm | 10 mm | 1 g |
| K8×11×8-TV | 8 mm | 11 mm | 8 mm | 1 g |
| K8×11×10-TV | 8 mm | 11 mm | 10 mm | 1.2 g |
| K8×11×13-TV | 8 mm | 11 mm | 13 mm | 1.7 g |
| K8×12×10-TV | 8 mm | 12 mm | 10 mm | 2 g |
| KT 8128 | 8 mm | 12 mm | 8 mm | 2.1 g |
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