SKF PRMF 404425 friction bushing
- Brand
- SKF
- Category
- Bushings and sleeves
- Subcategory
- Friction bushings
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Description
SKF PRMF 404425 belongs to friction bushing, part of our Bushings and sleeves range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for PRMF 404425 and any equivalents.
SKF PRMF series plain bearings are thin-walled cylindrical bushings that press into a housing to control wear between moving surfaces. They fit shafts, pins and joints where a full bearing will not go. Because they are replaceable once clearance passes the tolerance, the surrounding assembly keeps working without re-machining the housing.
The PRMF code carries the dimensions. Leading digits give the bore, following digits the outside diameter, both in millimeters; length or material variants can appear in the suffix. Take PRMF 252825: bore 25 mm, outside diameter 28 mm, length 25 mm. Other codes change those values, so confirm the complete designation before asking for an equivalent.
Typical applications include agricultural machinery, earthmoving equipment, conveyors, presses and hydraulic systems, plus pumps, fans and machine tools running with oscillation or slow rotation. Dust and load make wear resistance the priority in seeding, harvesting and trailer repair work.
Selection starts with three measurements: shaft diameter, housing bore and seat width. Install by press fit or with anaerobic adhesive, keeping the bushing square to the housing. Lubrication matters. A bushing without grooves needs an external lubrication point. Check shaft roughness and hardness before assembly, since a scored shaft or excessive clearance shortens the replacement interval.
For equivalents, match standardized dimensions from other brands. Codes are not universal, but catalogs list metric sizes. Compare bore, outside diameter and length, then verify the housing tolerance. MR Industrial Accessories LLC supplies the SKF line. Send the plain bearing code or your shaft and housing measurements by WhatsApp or email, and the team will quote the right option and advise on assembly and lubrication.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- How do I read an SKF PRMF plain bearing code?
- The digits show dimensions in millimeters: first the inner diameter, then the outer diameter, then the length. PRMF 252825 means 25 mm inner diameter, 28 mm outer diameter and 25 mm length. Suffixes can indicate width or material.
- What is the correct way to install a PRMF plain bearing?
- Press it into a clean, aligned housing using a press or mallet and a support block. If the bushing has no lubrication grooves, add an external lubrication point. Keep the shaft and housing free of dirt and burrs.
- Can SKF PRMF plain bearings be replaced with other brands?
- Yes, when the standardized inner diameter, outer diameter and width match. Codes differ between brands, so compare actual dimensions and check the housing tolerance before fitting a replacement.