Heavy-Duty FF3525 Flat Needle Roller Assemblies for Heavy Machine Tool Slides
| Item No : | FF3525 Flat Needle Roller Cage Assembly |
| Size (d*D*B) : | 3.5x25x75mm |
| Material : | Bearing Steel GCr15 + Nylon PA66 |
| Lead Time : | 3-5 days |
| Weight : | 0.017KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The FF3525 (3.5x25x75mm) is a heavy-capacity, ringless flat needle roller cage assembly designed for medium-to-heavy linear stroke guiding and reciprocating slide mechanisms. Featuring a compact 3.5mm section height across a 25x75mm active footprint, this ringless design integrates high-durability polyamide PA66 cage pockets holding precision-ground GCr15 chrome steel needle rollers. By riding directly on hardened flat machine guide ways without separate raceway rings, it maximizes vertical rigidity and linear contact load capacity within extremely tight envelope dimensions. Supplied under our RMO brand, we also provide custom global OEM manufacturing for heavy machine tool builders, linear guidance system manufacturers, and automation equipment integrators.
⚙️Product Features:
- Ultra-Slim 3.5mm Envelope Profile: Operates directly on hardened machine bed tracks without inner/outer rings, drastically reducing structural stack height.
- PA66 Molded Retainer Geometry: Tough PA66 resin cage prevents needle-to-needle friction, providing precise alignment and smooth reciprocating movement.
- High-Crush Strength GCr15 Rollers: Micro-polished GCr15 chrome steel rollers deliver superior surface hardness and resistance to heavy shock loads.
- Extended 75mm Footprint Contact: Distributes linear loading evenly across 75mm length, minimizing local stress concentrations and track wear.
⚙️Product Application:
Engineered for heavy reciprocating loads, ultra-low profile integration, and rigid linear guidance, the FF3525 flat needle cage is widely specified in:
- Heavy machine tool slides: CNC milling machine bed guides, surface grinder table ways, and planer sliding saddles.
- Metal forming & press machinery: stamping press die cushions, hydraulic press bolster slides, and shear machine backgauges.
- Precision linear positioning: heavy-duty optical alignment stages, industrial X-Y gantries, and automated transfer carriages.
- Specialized industrial equipment: injection molding ejector slides, packaging machinery reciprocating pushers, and textile looms.
⚙️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 | FF3525 Flat Needle Roller Cage Assembly |
| Dimensions | 3.5x25x75mm (Thickness d x Width D x Length H) |
| Structure Type | Ringless Flat Cage with Needle Rollers |
| Cage Material | High-Strength Nylon PA66 Retainer |
| Motion Type | Linear Reciprocating / Flat Track Guidance |
| Target Application | Machine Tool Bed Ways, Presses, Linear Slides |
| 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 |
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