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- Family Owned Business Since 1984
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PFERD provides mounted flap wheels / Fan Grinders with various
- grit sizes,
- abrasives and
PFERD mounted flap wheels are supplied with the standard shank length of 40 mm. The coated abrasive flaps are arranged radially around the tool axis in a fan-type configuration. Due to their flexibility, they adapt ideally to the contours of the workpiece. The abrasive grit is embedded in a resinoid bond on the strong, flexible backing cloth. PFERD mounted flap wheels are designated "Flap Wheels with Shaft" according to ISO 3919.
- High flexibility
- High stock removal due to the aggressive coated abrasive
- Carrier material wears off uniformly and without residue on the workpiece surface, meaning that sharp abrasive grit is exposed at all times
- Due to the flat cast core construction, the face of the mounted flap wheels can be used to work very close to edges and in corners
- Fine grinding on radii in tool and mould construction
- Machining of small and hard-to-reach areas in apparatus engineering and tank construction
- Machining of fittings made out of nonferrous and light metals
- Grinding of turbine blades in aircraft engine construction and repair
Recommendations for use:
- Mounted flap wheels achieve their best performance at a recommended cutting speed of 15ǐ20 m/s. This provides an ideal compromise between stock removal, surface quality, thermal load on the workpiece and tool wear.
- Flexible shafts, electric and air-powered straight grinders can be used as tool drives
- Use grinding oil that is suitable for the material in order to significantly increase the tool life and the abrasive performance of the tools.
Factors influencing the work result:
- Tool wear and thermal load: The reduction of the contact pressure and the peripheral speed, together with the addition of grinding oil, reduce tool wear and the thermal load on the workpiece.
- Stock removal: An increase in stock removal should be attained by using a coarser grit size rather
than by increasing the contact pressure in order to prevent unnecessary tool wear and thermal load on the workpiece.
- Surface roughness: The increase in cutting speed results in a slightly finer surface. By increasing the
contact pressure, the surface becomes slightly rougher. The softer the material to be worked, the rougher the surface (if the same grit size is used).
- For safety reasons, it is imperative to remain within the stated maximum permitted rotational
speed at all times
- Safety is only guaranteed if:
- The clamping depth is at least 15 mm
- The specified maximum rotational speed for unsupported shank lengths is not exceeded
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