Challenge Drill Bit Jumbo 3/4" Steel
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Challenge Drill Bit Jumbo 3/4" Steel

Part Number: STJUMBO-3/4

Challenge Jumbo (a.k.a. Paint Can) drill bits are compatible with Challenge MS-10 machines that have been converted to large hole drilling with the A-6500-7 kit. Select from a variety of sizes and styles below.
$300.00 /EACH
List price: $300.00 /EACH
    • EACH
  • Availability: Available to Order

Drill Bit Types

Steel: Uncoated steel drill bits will cover a majority of basic drilling applications - normal paper stock, light to medium weight.

CHT (Teflon): Teflon coated to prevent build-up and increase drill bit life by reducing heat. Works great for medium to heavy weight and coated stocks. 

Drilling Tips

Keep Drills Sharp: Sharpen drills every 4 to 8 hours of use - even more when drilling through hard or abrasive stock. Most breakages occur as a result of dull drills.

Keep Drills Clean: This is especially true when drilling perfect bound books and glue. If the inside of a drill is not cleaned, glue will harden and snap a drill bit upon next use. Use a small brush with solvent to clean the inside of the drill bit. Bits can also be lightly oiled to reduce rust or corrosion when not in use.

Keep Drills Lubricated: Some bits are coated (i.e., Teflon), which will provide lubrication. Consider using a lubricating stick to reduce heat and clogging.

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