Drill Bit Sizes
2" Capacity Drill Bits are used on all Challenge and Spinnit/Lassco
Drills with the exception of the 1" table top machines.
2-1/2" Capacity Drill Bits are used in Challenge models EH-3A,
EH-3C, MS-5 and MS-10A. These models will also accept 2" drill bits
when the heads are adjusted down to the lower position. Generally if
you own a 2-1/2" capacity drilling machine you will only purchase 2"
bits if the size you require is not available in 2-1/2". There are nine
additional size drill bits available in 2" which are not available in
the 2-1/2" capacity size. Please remember to adjust your heads to the
uppermost position before changing between a 2" and a 2-1/2" drill bits
to prevent risk of breaking your bits. Please note that the old style
EH-3 (110volt yellow machine) will only accept 2" capacity drill bits.
1" Drill Bits are only used in the smallest of Challenge and
Spinnit/Lassco paper drills. Drill bits are not interchangeable between
manufacturers, so please specify make and model when ordering 1" drill