The APT Model 155 Rock drill is a tough, 60 lb class Rock Drill. This tool can be used in general construction as well as in utility work and plant maintenance. It is designed for drilling through granite, hard faced rock, quarry drilling, and drilling secondary holes for blasting. This tool can also be used with dowel hole drilling machines. Adaptable to wet drilling applications by attaching the APT valve, wet tube and swivel assembly.
View and/or Download M155: Spec Sheet / Manual
TECHNICAL INFORMATION
| Part # | Units | 5229 | 5230 | 5231 | 5232 | 5233 | 5234 |
| Type | in | Dry | Wet | Dry | Wet | Dry | Wet |
| Hex Chuck Size | in | 7/8" x 3 - 1/4" | 7/8" x 4 - 1/4" | 1" x 4 - 1/4" | |||
| Bore Diameter | in | 2 - 5/8" | |||||
| Stroke | in | 3" | |||||
| Blows per Minute | bpm | 2100 | |||||
| CFM @ 90 psi | in | 110 - 120 | |||||
| Weight | lbs | 61 | |||||
| Length | in | 22 - 3/8" | |||||
| Air Inlet NPT | 3/4 MALE NPT | ||||||
STANDARD FEATURES
- 3 Drilling Speeds
- Built-in automatic oiler
- Replaceable piston stem bearing
- Available in wet or dry models
- Counter clockwise rotation
- Rubber handle grips
Air Pressure
The recommended air requirement for the operation of APT tools is 90 psi (6.2 bar). Lower air pressure will decrease power, too high a pressure will increase unwanted stresses in the tool. For proper CFM ratings, please refer to the specification charts shown for each tool in this catalog.
Hose Size
APT recommends the use of at least 1⁄2” inside diameter or larger hoses to assure sufficient air flow to the tool. For portable compressor hose and longer lengths, 3⁄4 “ hose is recommended. Keep the overall length of the hose to a minimum to prevent pressure loss at the tool.
Connecting Hoses
Hoses should be rated for a minimum of 250 psi (17.2 bar). Before connecting the air hose to the tool, check the tool inlet connector to be sure it is clean and free of dirt or debris. Keeping dirt and debris from entering the tool will assure long and satisfactory operation.