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- Challenge Drill Bit Jumbo 1-3/8" Steel
Challenge Drill Bit Jumbo 1-3/8" Steel
Part Number: STJUMBO-C1-3/8
List price: $300.00 /EACH
- Challenge Drill Bit Jumbo 3/4" Steel
- Challenge Drill Bit Jumbo 1" Steel
- Challenge Drill Bit Jumbo 1-1/8" Steel
- Challenge Drill Bit Jumbo 1-3/16" Steel
- Challenge Drill Bit Jumbo 1-1/4" Steel
- Challenge Drill Bit Jumbo 1-1/2" Steel
- Challenge Drill Bit Jumbo 1-5/8" Steel
- Challenge Drill Bit Jumbo 3/4" Teflon
- Challenge Drill Bit Jumbo 1" Teflon
- Challenge Drill Bit Jumbo 1-1/8" Teflon
- Challenge Drill Bit Jumbo 1-3/16" Teflon
- Challenge Drill Bit Jumbo 1-1/4" Teflon
- Challenge Drill Bit Jumbo 1-3/8" Teflon
- Challenge Drill Bit Jumbo 1-1/2" Teflon
- Challenge Drill Bit Jumbo 1-5/8" Teflon
- 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.