2. Screw Gun Information

To obtain maximum performance from the self-drilling fastener, drivers that have been developed and approved for them should be used. These drivers must turn at 1900 to 2500 RPM and be rated at 4 Amps or higher. Drivers must be equiped with a positive clutch and a depth-locating nose piece.

Note: Do not use an impact tool or nut runner.

3. Instructions for Trouble-Free Drilling

A. Pre-drilling of panels (stack up to 10 sheets) while on the ground. Will provide better alighnment of fasteners and screws. Refer to fastener location details on the roof and wall instructions.

B. Be sure that the depth-locator on the power driver is used and properly adjusted.

C. Remember, the drill point must be long enough to drill the hole before the threading action begins. Screws cannot drill and form threads at the same time. The hole must be completed before the tapping action begins. A pilot hole or #5 fastener will be required in material thickness greater than indicated on section 1. Be sure to use the correct fastener for the correct attachment.

D. When drilling screws into framing, do not push too hard with the screw gun. This causes excess friction and can burn out the drill point. Correct pressure will allow screws to drill and tap without binding. See Figure #1 for properly seated fasteners.

E. Where purlins or girts are over-lapped, they may not nest properly and may be too far apart, making the drill point too short. It may be necessary to drill a pilot hole in the top purlin, then run in the screw to complete fastening.

F. When drilling through insulation, press screw through until contact is made with steel and starts to drill. Apply more pressure as drill point penetrates steel.

Note:

Screws with sealing washers may be furnished with an integral head and washer. Refer to shipping list for proper fastener usage.

Figure #1
Properly Seated Fasteners