OK guys, I said I would post some information here to help out the newer guys and maybe even teach the experienced people something new.
Here are a few tips and tricks I've leaned over the years. Maybe one of them will help you out.
WD-40 is some great stuff. Here are a few uses for it.
• WD-40 will remove epoxy from areas you don’t want it, including your fingers.
• WD-40 can be sprayed onto your grinding belts to reduce heat and extend belt life.
• WD-40 takes masking tape gum right off your blade.
• WD-40 if sprayed on titanium will show you the grain pattern of the titanium.
Knife maintenance.
• Use Carnuba wax to coat your knives to avoid tarnishing and keep them shining.
• A pair of ***** hose works GREAT for putting the final polish on a oil finished handle (or gunstock).
Titanium
• To remove broken taps from titanium, soak in muratic acid. The acid will eat the tap but won’t hurt the TI.
• Titanium has a grain, just like steel. There will be less chance of a lock failure if you always cut out the lock side with the grain going length ways.
• Don’t breath the fume's from titanium, they will make you sick.
• Don’t use your best belt's on titanium. Titanium will dull them quickly. However a really dull belt will not cut well and will just "push" the titanium around.
• Jewelling is normally done with a brush or rubber or fiber stick (like a "pencil eraser" in a drill press). The brush or rubber/fiber cylinder is charged with an abrasive and then lowered onto the surface to be jeweled. The circular marks are made in a line, slightly overlapping each other, and then the next line started to overlap the first, etc. Most gunsmithing books in the library will have a "how to" discussion on this. It helps to have an indexing jig to get nice even spacing and straight lines.
• When polishing titanium get as many scratches out of the material as possible. Hand sand to 600 grit removing ALL the scratches. Wet sand with WD40. Then use a cloth wheel on the buffer with white stainless compound, and use LOTS of heavy pressure. The metal heats up pretty quick this way. Turn the work 45 degrees and buff again, using as heavy pressure as possible. You will get an absolutely perfect mirror finish that looks like platinum.
File work
• Use carbide cutters in your router (up side down) to start your file work. This makes the half rounds in a very short time. All file work should be done in annealed steel if possible.
• Practice new file work patterns on the part of the metal that is going to be ground away. Then when it looks right, you can put it where you want it and you've practiced on the same metal that it's going to end up on.
General Knife Making
• Use vinegar to clean up epoxy while it is still wet.
• Glue a scrap of leather to a wood block. When you sand it makes a nice cushion and helps the paper conform to the shape you are sanding.
• When gluing handle slabs use wax paper around them to keep the epoxy from sticking to the clamps.
• Tape a few strips of masking tape onto your counter top. Mix your epoxy on it and pull up to clean up.
• Consider getting foot switches for some of your tools. A drill press can be easy to use when you just walk up and step on a pedal to make it run, let go and it stops.
• For creating great plunge cuts, hang the belt off the edge of the wheel a little. BREAK the edge down a little by using scrap steel to roll it around the edge.
• To remove solder from blade/guard joint, make a small chisel out of copper. The copper is softer than the steel and nickel silver or brass you use for the guard so it will not scratch anything.
• Use pieces of scrap leather to hold knives in a vise. The leather will not let the jaws damage the blade.
• If you don't have a surface grinder and want to get something flat, try taping a piece of sandpaper to a thick piece of glass. Sand on the flat glass. Mark the blade with a black "Sharpie" marker and it will show any uneven spots on the steel. Use a micrometer or calipers to check thickness the length of the piece.
• A chisel made of bamboo works well for removing epoxy from unwanted areas.
• When completely through with a folder, clean all threads of the pivot with acetone before using loc-tite on the pivot screw.
• When buffing thin blades 1/16" thick, take a piece of 2X4X 18" and drive a finishing nail into one face near the end with about 1/4" exposed. This end becomes the Top. Hang the blade on the nail by the top pin hole and with the blade resting on the face of the 2X4 buff the face then turn the blade over and buff the other face.
• The best file handle I have ever seen is golf balls. Take a golf ball and carefully drill a hole a little smaller than the file tang. Jam the file into it and your set to go. Works real well when pushed with the palm of the hand.
• Try putting a few drops of dish soap in the water you use to catch grinding grit and cool things off. It keeps the water molecules form hooking together right so the grit can't float.
• Put in about a 1/2 cup of Baking Soda into 5 gallons of water, this helps stop steel from rusting during grinding and cooling in your dip bucket.
• To keep a file from marking up the tang and making a nice little groove when filing guards and bolster. Grind any file teeth off of the edge of the file and just slightly touch the edges to grind any sharp edges off. This will let you be able to file right next to the tang or blade without making scratches or grooves.
• Use the rubber soles on old sneakers to clean your grinding belts! They work great.
• Stick a magnet to the side of your drill press. Then stick your chuck key to the magnet for easy to find storage.
• Mount a sheet of plywood to the ceiling of your shop and screw the lids of baby food jars to it. Then you can store items in the jars and put them on the ceiling for storage. Just look up and find the item you want.
• If you are preparing to build a new shop, cover the interior walls with plywood. This give a solid surface for hanging stuff. You can pound in a nail anywhere you want and get a good solid spot.
• Glue strong magnets to the bottom of a cookie sheet. This will keep small parts from rolling off of the table during final assembly of your knife.
• Cut a piece of heavy cardboard a little bigger than your knife blade. Push the blade between the layers and then cover with duct tape. You now have a very durable temporary knife sheath to protect your blade during the rest of your work.
• Slip a piece of rubber bicycle inner tube over the blade. The rubber is incredibly tough and if the knife isn't sharpened yet, it will even take a few misplaced file strokes without tearing through to the mirror polished blade.
• If you need to use an open housing motor in a workshop, cover it with nylons. They will keep the dust out of the motor.
Heat Treat
• Temper small pieces by heating a bar of steel on which the piece to be tempered is placed. This gives a great deal of control because the steel heats more slowly than a small piece and the color is more discernible since it is not being held in a flame.
• To prevent Scale during heat treat, use a mixture of borax and boiling water and dip the blades in....1/3 borax in a container and fill the rest with water bring to a boil.. Dip blade in, let dry then go about your normal heat treating. When you quench in oil the protective borax cover will flake right off and leave you with a blade that looks similar to what you started with and you won't have to grind that stubborn scale off!! Works great!!
• SUPER QUENCH -, Super quench is the term coined for a concoction developed to allow low carbon steels to be hardened to some extent. It is a mixture of water, borax, liquid dishwashing soap and a surfactant to eliminate as much surface tension in the water as possible. Even with low carbon steel like 1018 it is possible to make it hard enough to cut unhardened mild steel. This quenching liquid works by wetting the surface of the steel and eliminating all the steam blanket effect. The steel must have a minimum amount of carbon or it will not harden. Too much carbon and there is a risk of catastrophic failure of the work. Start with 5 gallons of water (a plastic dry wall mud bucket) and add a large container 16 oz of LIQUID DISHWASHER SOAP. Mix it up, and then add salt until no more will dissolve, and add at least a handful more. Mix in a bottle of Jet dry dish washing spot remover. Keep the container covered. To use, get the part bright red and then plunge it into the solution with agitation in a small circle. You want to stir it rapidly around in about a 3" circle. When it's cold, check the hardness with a file. You'll be surprised how hard some things will get. NEVER (never) use this solution on spring steel, or anything else that has high carbon content, or that you are uncertain as to the carbon content. You risk shattering the piece and hurting yourself in the process.