The Tamco/Toku TJ-20 is a 40 lb class handheld pneumatic rock drill the mid-weight of Toku’s line for anchor-hole drilling, foundation pins, quarry bench work and rock bolting. A 2-3/4 in. piston bore with a 1-15/16 in. stroke drives 2,400 BPM through the chuck, splitting the difference between the 30 lb TJ-15 and the 60 lb TS-55 in the same family.
Both chucks 7/8 x 3-1/4 and 7/8 x 4-1/4 in. run hex shanked drill steel. Budget 87 CFM at 90 PSI and one 185 CFM compressor per drill. Tool weight builds from 41 to 48 lb with chuck choice, light enough to move hole to hole all shift, and the rock drills category puts every class we stock side by side.
- 40 lb class handheld drill; 4148 lb tool weight by chuck, 24-1/32 in. overall length
- 2,400 BPM from a 2-3/4 in. piston bore and 1-15/16 in. stroke
- 87 CFM at 90 PSI; size a 185 CFM compressor for single-drill service
- Chuck options: 7/8 x 3-1/4 and 7/8 x 4-1/4 in. hex
- Applications: anchor holes, foundation pins, quarry benches, secondary breaking and rock bolting
- Built by Toku, a long-established Japanese pneumatic-tool manufacturer
- Stocked in Denver by Crowder Supply with steels, bits, chucks, pistons and seal kits
Toku TJ-20 Rock Drill FAQ
What size compressor runs the TJ-20?
It consumes 87 CFM at 90 PSI, so plan on a 185 CFM compressor per drill; larger 375 CFM units run multiple drills on the same circuit.
What drill steel does the TJ-20 take?
It comes with a 7/8 x 3-1/4 in. or 7/8 x 4-1/4 in. hex chuck and runs standard hex shanked drill steel; tool weight is 41 or 48 lb depending on chuck.
TJ-15, TJ-20 or TS-55 which class do I need?
The 40 lb class TJ-20 sits between the 30 lb TJ-15 and the 60 lb TS-55: enough blow energy for anchor holes, quarry benches and rock bolting while staying light enough to carry hole to hole. The rock drill buyer’s guide walks through the weight classes.
Who makes the TJ-20?
Toku sold as Tamco/Toku a long-established Japanese pneumatic-tool manufacturer with a deep catalog of industrial rock-drilling and demolition tools.
