Coach Screws Galvanized

Pilot Drill Advice for Hex Head Coach Screws

Hex head coach screws, also known as lag screws, require appropriate pilot holes to ensure proper insertion and secure fastening. Below is the recommended pilot hole sizes for various diameters of hex head coach screws.

Tips for Drilling Pilot Holes:

1. Material Consideration:

   • Softwood: Use the smaller recommended pilot hole size.
   • Hardwood: Use the slightly larger pilot hole size to prevent splitting and ensure easier screw insertion.
   • Masonry: Use the exact size of the screw for pilot holes to ensure a snug fit.

2. Drill Bit Selection:

   • Wood: Use a high-speed steel (HSS) bit for drilling into wood.
   • Masonry: Use a masonry bit for drilling into concrete or brick.

3. Drilling Depth:

   • Ensure the pilot hole depth is slightly less than the length of the screw to allow for proper threading and holding power.

4. Drill Speed:

   • Use a moderate drill speed for wood.
   • Use a slower drill speed for masonry to prevent overheating and bit wear.

5. Lubrication:

   • When drilling into hardwood or masonry, use a lubricant like cutting oil or water to reduce friction and heat build-up.

Additional Tips:

• Marking the Drill Bit: Use tape or a drill bit depth stop to mark the desired drilling depth on the bit.
• Stabilizing the Workpiece: Ensure the material is securely clamped or held in place to prevent movement during drilling.
• Clearing Debris: Periodically pull out the drill bit to clear debris from the hole, especially when drilling deep holes.

By following these guidelines, you can ensure secure and stable fastening with hex head coach screws in various materials.