This set is designed one size under bore and hardened C1144 steel for long life. The drill lube is to ensure smooth minimal friction between the drill bit and the guide, cooling the bit, keeping it from galling, which aids in longer drill and guide life. Dip drill bit in lubricant at least once for every rivet.
The guides are easy to use. First select the appropriate guide for the rivet being drilled.
Use #31 drill bit and guide for 1/8 inch diameter rivets.
Use #21 drill bit and guide for 5/32 inch diameter rivets.
Use #13 drill bit and guide for 3/16 inch diameter rivets.
Use Letter "D" (.246) drill bit and guide for 1/4 inch diameter rivets.
The guides allow you to drill straight and center every time. They are compact, easy to grip and easy to spot if dropped. They were designed to eliminate double drilled holes and drill bits "skating" off of rivets.
Just what the Dr ordered
I bought this to remove rivets in a cargo trailer I purchased so I could run additional inside illumination lights. The rivets used inside the trailer were 3/16â€ť (a size that is listed for this product) but they were the â€ślarge headâ€ť rivets (to better hold the felt wall board in place). Unfortunately, this kit only works for â€śstandardâ€ť AN-470 (Army/Navy spec) head universal rivets. I thought I could make them work on non-aviation rivets like the ones sold at the Big Box stores, but I made a mess of the rivet and surface, which I could have done with only a drill bit and without using this product. Itâ€™s a great concept/product if you need to drill out a standard rivet head on an airplane, but the principle at work here is that you securely place the drill guide over the rivet head to center the drill bit on the rivet head center pin. If you try this on large head rivets, the drill guide slides all over the head and ends up drilling a hole thru the side (not center) of the rivet which ultimately damages the surface under the rivet, exactly what this kit is designed to prevent. If you call the telephone number on the box label to see if they have, or can make a large head guide, you get voicemail, but no return call.
This product is Made in the USA.