Flap drums

Flap Drum, 4" x 4, 3/4" Keyed Arbor, 40 Grit, Aluminum oxide

Item number:: 44783040
EAN:: 4007220770498

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Technical information

Flap Drum, 4" x 4, 3/4" Keyed Arbor, 40 Grit, Aluminum oxide

Abrasive: Aluminum oxide A
Dia. external: 4 Inch
Dia. external: 100 mm
Dia. hole: 3/4 Inch
Dia. hole: 19 mm
EDP no.: 45780
Grit size: 40
Max. RPM: 6100 RPM
RPM, optimum: 3800 RPM
Width: 4 Inch
Width: 100 mm
Packaging unit: 1 piece

Description

Designed for universal work on medium-sized and large metal surfaces, e.g. fine grinding work on large radii in container, kitchen, and appliance construction, and achieving uniform finishes (grinding patterns) on large surfaces and contours in manual applications. Designed for all conventional keyway systems.

Advantages

Conforms to contours due to high flexibility.
Consistently high stock removal rate throughout the entire service life as new, aggressive abrasive is constantly exposed.

Recommendations for use

Flap wheel wear and the thermal load on the workpiece are reduced by decreasing the contact pressure and peripheral speed, and by adding grinding oil.
Stock removal rate should be increased by using a coarser grit, not by increasing the contact pressure. This avoids unnecessary flap wheel wear and prevents the thermal load of the workpiece.
Increasing the speed results in a slightly finer surface quality. An increase in contact pressure results in a slightly coarser surface. The softer the workpiece material, the coarser the resulting surface (when using the same grit size).
For the best performance, use with a recommended peripheral speed of 3,000-6,000 SFPM. This provides an ideal compromise between stock removal rate, surface quality, thermal load on the workpiece and tool wear.
Use the appropriate grinding oil for the material to significantly increase the service life and the abrasive performance of the discs.
For the best results, use a power tool with 1,000–1,500 watts.

Ordering notes

The hole 3/4" center hole diameter with 4 keyways fits all conventional drum grinders.

Safety notes

For safety reasons, the maximum permitted rotational speed indicated must never be exceeded.
The contact pressure has to be reduced significantly when the optimum rotational speed is exceeded.
The maximum permitted peripheral speed is 6,300 SFPM.

Materials that can be worked: Aluminum; Annealed cast iron; Brass; Cast steel; Copper; Grey/nodular cast iron (GG/GJL, GGG/GJS); Hardened, heat-treated steels over 370 HV (38 HRC); Steel materials with a hardness > 54 HRC; Steels up to 370 HV (< 38 HRC)

Applications: Deburring; Leveling; Step-by-step fine grinding; Structuring (matt finishing, brush matting and satin finishing); Surface work; Work on weld seams

Drive types: Drum grinders

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Flap drums

Flap Drum, 4" x 4, 3/4" Keyed Arbor, 40 Grit, Aluminum oxide

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