Bit retaining spacers hold the drill bit in a down-the-hole hammer: the ring seats between the hammer chuck and the bit shank shoulder, keeping the bit retained and aligned while still allowing the limited axial travel that percussion drilling requires. Machined passages preserve flushing flow, and hardened wear surfaces stand up to rock dust and high-velocity air.

Sized to match specific hammer and bit interfaces from 3 in. class hammers up to 12 in. and larger, spacers protect the chuck and the bit shank from impact and rotation wear. Replace them when rebuilding a down-the-hole hammer, pair them with fresh DTH drill bits such as our concave face DTH bit, and lean on the DTH hammer buyers guide for the rest of the system.

• Fits DTH hammer sizes from 3 in. through 12 in. and larger, matched to the hammer and bit interface
• Seats between the hammer chuck and bit shank shoulder to retain and align the bit
• Allows the limited axial bit movement needed for impact transfer and flushing
• Hardened wear surfaces resist erosion from rock dust and high-velocity flushing air
• Protects the chuck and bit shank from impact and rotation wear
• Stocked by Crowder Supply in Denver