Drive Weights

Light duty (140 lb.) drive weights are primarily used for "Standard Penetration Tests" with drive type samplers.

Heavier drive weights are used to drive pipe, casing, chopping bits, boulder busters and heavy duty samplers. They are operated like a pile driver.

Drive weights are available with or without a chain sling.

Drive Heads

Acker Drive Heads are threaded with a pin thread on the bottom to take the casing being driven and a box thread on the top to accommodate a guide and pull piece. Reverse drive action is used to pull the pipe. Internal box threads are used to accommodate drive samplers or chopping bits.

All Drive heads are supplied with AW box thread unless otherwise noted.
Other size internal rod box threads available.
Three inch guide pipe available.

Pipe Drive Rings

Drive rings are designed to slip over the drive pipe and rest against the pipe coupling. The ring protects the coupling and drive hammer when bumping out or driving the pipe.

Pull Piece

Assembly is made from double extra-heavy drive pipe threaded at both ends and includes a drive pipe coupling. It screws directly into the top of the drive head (not included). The drive pipe coupling is used when bumping back casing or samplers. The pipe stem serves as a guide for the drive weight.

Safety Hammers

"One piece" hammer design provides safety, accuracy and speed for sampling operations. Hammering and bumping actions are enclosed in the hammer body for safety with the added advantage of carrying out both operations without a change of tools. The hammer body is 3/4" (19mm) wall carbon steel tubing with the head and bumping block made from high grade carbon steel. The head is threaded and welded into the body for durability. A 50" (127cm) AW drill rod (with replaceable coupling) is threaded and welded into the anvil providing a 34" (86.4cm) stroke. Overall Length is 61" (154.9cm). The assembly weight is 162 lbs. (73.5 kg.)

Drive Bits

Boulder Busters
Hardened tough nose, bull point boulder busters are attached to drill rod
and driven by a drive weight and cathead hoist. Boulder busters are used
to break up boulders that lie ahead of the casing. Boulders may more easily shatter if a hole is drilled through the boulder prior to driving.

Chopping Bits

Cross Chopping Bits

Cross chopping bits are used to clear the way when driving casing into coarse gravel, small boulders, etc. They are also useful for cleaning out holes drilled in rock.

Straight Chopping Bits

This type chopping bit is used to clean out material that has accumulated inside the casing. Water is pumped through the drill rods and out the ports in the bit to flush the material from the casing.