NK25/16 Outer Ring Needle Roller Sleeve 25x33x16mm for Industrial Gearboxes
| Item No : | NK25/16 |
| Size (d*D*B) : | 25x33x16mm |
| Material : | Chrome Steel Gcr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.033KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The NK25/16 (25 x 33 x 16 mm) is a heavy-duty machined solid collar needle roller bearing designed without an inner ring for high-rigidity, space-restricted industrial power transmissions. Engineered with a 25mm shaft diameter (inscribed roller diameter Fw), 33mm outer diameter, and 16mm width, this compact bearing utilizes a thick, rigid outer ring with integral retaining flanges to guide high-precision needle rollers under severe radial forces. By using a hardened, ground shaft directly as the inner raceway, it minimizes housing design envelope while maintaining extreme radial load capacity and stiffness. We maintain extensive stock of our proprietary RMO brand alongside sourcing solutions for premier global brands, serving manufacturers of industrial speed reducers, hydraulic gear pumps, automotive manual transmissions, and textile machinery drives.
⚙️Product Features:
- Machined Solid Outer Collar Construction: Rigid, heavy-section outer ring handles substantial radial load peaks and prevents housing deformation under heavy stress.
- Inner Ringless Direct Shaft Run: Eliminates the inner ring to maximize shaft diameter and stiffness while reducing radial section height to just 4mm.
- Integral Flange Roller Guidance: Solid retaining ribs provide rigid axial retention and low-friction guidance for high-density roller assemblies.
- High Radial Capacity in Compact Footprint: Maximum roller density within a 33mm outer diameter sleeve yields exceptional fatigue life under heavy dynamic loads.
- Flexible Dual Sourcing: Direct factory supply from RMO warehouse stock paired with fast procurement channels for top international needle bearing brands.
⚙️Product Application:
- Industrial Speed Reducers: Planetary gear carrier shafts, planetary wheel pivot pins, and multi-stage reduction countershafts.
- Hydraulic & Fluid Power Systems: High-pressure hydraulic gear pump drive shafts, valve plate actuator pivots, and fluid motor gear sets.
- Automotive & Transportation Drives: Commercial vehicle manual transmission countershafts, transfer case shafts, and PTO drive units.
- Textile & Printing Machinery: High-speed spinning frame drafting rollers, printing press cylinder drive shafts, and loom rocker arms.
⚙️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:
| Item No. | NK25/16 |
| Exact Dimensions | 25x33x16mm (Bore d x Outer Dia D x Width/Height H) |
| Bearing Type | Solid Collar Needle Bearing (Without Inner Ring) |
| Outer Ring Structure | Machined Solid Steel Collar with Integral Ribs |
| Inner Ring Provision | Without Inner Ring / Requires Hardened Shaft |
| Roller & Cage Material | Chrome Steel Rollers with Rigid Steel Cage |
| Radial Load Rating ( Basic Dynamic Cr ) | Approx. 18.5 – 21.0 kN |
| Limiting Speed | Approx. 16,000 – 18,000 RPM |
| Target Machinery | Speed Reducers, Hydraulic Gear Pumps, Automotive Transmissions |
| Lead Time | 3-5 days for stock; 7-15 days for bulk orders |
| Package | Individual plastic bag, plastic tube or original RMO brand box |
| Brand | RMO (Own Brand) / Neutral / OEM Custom / Other Global Brands |
| Shipping Method | Express (DHL/FedEx/UPS), Air Freight, Sea Freight |
| Shipping Port | Guangzhou, Ningbo, Shanghai |
| Payment | 100% T/T, or 30% T/T In Advance, 70% T/T After Finished Production |
| Model No. | d | D | H | m |
| NK25/16 | 25 mm | 33 mm | 16 mm | 32.6 g |
| NK25/20 | 25 mm | 33 mm | 20 mm | 42 g |
| NK26/16 | 26 mm | 34 mm | 16 mm | 34 g |
| NK26/20 | 26 mm | 34 mm | 20 mm | 42 g |
| F-45397.2 | 27 mm | 42.86 mm | 25.4 mm | 118.7 g |
| NK28/20 | 28 mm | 37 mm | 20 mm | 52.2 g |
| NK28/30 | 8mm | 37 mm | 30 mm | 82 g |
| F-201379 | 28.58 mm | 41.28 mm | 25.4 mm | 102 g |
| F-110036 | 28.58 mm | 41.28 mm | 25.4 mm | 107.9 g |
| F-45779 | 28.59 mm | 46.04 mm | 31.75 mm | 198.3 g |
| NK29/20 | 29 mm | 38 mm | 20 mm | 50 g |
| NK29/30 | 29 mm | 38 mm | 30 mm | 84.3 g |
| NK30/20 | 30 mm | 40 mm | 20 mm | 61 g |
| NK30/30 | 30 mm | 40 mm | 30 mm | 92.4 g |
| NK32/20 | 32 mm | 42 mm | 20 mm | 64 g |
| NK32/30 | 32 mm | 42 mm | 30 mm | 102 g |
| F-52521.2 | 32.77 mm | 49.21 mm | 28.58 mm | 171.2 g |
| F-51201 | 33 mm | 48 mm | 15 mm | 70.9g |
| F-45898 | 33 mm | 50.98 mm | 20 mm | 122.1 g |
| NK35/20-TV-XL | 35 mm | 45 mm | 20 mm | 69.4 g |
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