Pferd 25900020 Bi-Metal Engineers Hole Saw Set, 13 pieces

• HSS hole saws made of shatter-proof and tough HSS bimetal are used on drilling machines and hand-held drills.

Set Contents:

• Hole Saw Sizes: 20, 22, 25, 32, 40, 44, 51, 57 and 64mm
• Hex Shank Arbor: 1/4" and 3/8"
• Pilot Drill: 6/90 (Long)
• Adaptor

Safety notes:

• When using shank extensions, the recommended hole saw rotational speed must notbe exceeded.

Recommendations for use:

• Clamp the pilot drill in the hole saw arbor and make sure that it projects at least 3 mm (1/8") over the teeth of the hole saw.
• When cutting metals, use high-quality cutting oil, if possible. This facilitates smooth running and lengthens the hole saw life. Exceptions: When working on aluminium, use kerosene instead of cutting oil.
• HSS hole saws are suitable for work on stainless steel (INOX).
• Remove any particles which develop during use from the workpiece in order to avoid corrosion.
• Clean the workpiece chemically or mechanically (etching/polishing, etc.).
• Make sure that all the teeth are applied evenly.
• Avoid swinging movements during sawing to prevent tooth breakage.
• Avoid overheating.