Piston is the Tamco/Toku service part carried under part number 430126E60. The piston is the striking mass of the rock drill; its condition sets impact energy, so scoring, mushrooming, or lost diameter shows up directly as reduced production.
The published breakdown lists it on the TJ 20 Rock Drill (RD 40). It comes off the Tamco/Toku TJ-20 Rock Drill.
Everything else on that machine is one page away, and the parts diagram library indexes every breakdown we publish. Stocked in Denver orders placed by 4 PM ET ship the same day when the part is on the shelf.
- Part number: 430126E60
- Manufacturer: Tamco/Toku
- Crowder SKU: TK-430126E60
- Listed on breakdowns for: TJ 20 Rock Drill (RD 40)

