How to make a flipper knife

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make a folder knife
The creator’s completed flipper folder—sanded, polished and able to go!
make a folder knife
The creator’s completed flipper folder—sanded, polished and able to go!

Folder making has superior a lot previously few years. Now, flipper folders are the recent new ticket.

Following is an outline of the steps in making a contemporary flipper by hand.

Studying: The right way to make a flipper knife

Draw It Up

how to design a knife
The elements are all minimize out. The holes in a single deal with aspect (middle) are middle punched and able to drill.
knifemaking tips
Design the knife elements on clear plastic so you possibly can see the place to find the whole lot.

To start, draw designs on paper and switch them to clear plastic. Reduce out the designs of the blade and deal with from the clear plastic. Overlap the tang of the blade on the deal with and insert a needle by way of each items the place the pivot pin can be.

From there, fold the blade onto the deal with and regulate the design as wanted.

Subsequent, hint across the plastic deal with on a titanium sheet. I take advantage of titanium in a 1/8-inch dimension for the highest a part of the deal with and .070 inch for the 2 backside items. Hint the blade and minimize it out.

Know the Drill

drill knife blade
Counter sink all of the holes a small quantity earlier than drilling them with the 1/16-inch drill bit.

Making folders is usually about drilling holes. Drill out one plate of titanium with 1/16-inch holes. Place one other plate of titanium beneath the drilled-out plate and clamp the 2 collectively. Flip it over and drill by way of the second plate.

Beginning with the pivot gap, place a ½x1/16-inch hardened dowel pin in it so the 2 plates will not transfer. Subsequent, drill the tip of the deal with and put a pin in it.

Proceed drilling, clamping and including pins the place your stand-offs go. Every time you drill a gap, take the plates aside and de-burr. A hand drill with a four-flute counter-sink is helpful for de-burring.

drill knives
Begin drilling all of the holes with a 1/16-inch drill bit.

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This flipper may have an inside cease pin, so do not drill throughout the highest plate. Nevertheless, do drill by way of the underside plate—the .070-inch one. From right here, affix the plates with 1/16-inch dowel pins. Clamp, take away the pivot pin, and drill and ream to three/16 inch for the pivot pin. De-burr and reassemble. Drill and ream a 1/8-inch cease pin.

CAUTION: Do not go throughout the highest 1/8-inch plate! Countersink the skin plates for the 2-56 screw heads. I take advantage of a #20 drill bit for this.

Pivot, Washers & Pins

make a flipper knife
Mill the slot for the cease pin.

Now it is time to countersink the 2 pivot screws. Various kinds of spacers and stand-offs can be utilized on a folder. For this flipper I used ones with shoulders from Usually I take advantage of custom-made stand-offs from Sheffield Knifemakers Provide. The shouldered step-down stand-offs stop any undesirable motion within the blade.

I open up the holes for the stand-offs to slot in with a 1/8-inch reamer. Really, I take advantage of a reamer .001 inch bigger, so it’s .126 inch.

The cool new factor with folders is pivot washers with ball bearings. There are lots of differing types from which to decide on. Michael Burch really helpful washers from Jantz Provide to me at BLADE Present.

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bladesmithing tips
Countersink the pivot screws.

It’s a must to sink the washers down into the scales a bit. I take advantage of a 3/8-inch, four-fluted finish mill to do that step. First, I index a 3/16-inch finish mill right into a gap on a plate of metal held in a mill vise. I lock down my desk and take out the three/16-inch finish mill and put within the 3/8-inch one utilizing a dial indicator to indicate how far down I’m drilling.

Most tactical folders are going fairly thick with washers .020-to-.040-inch on either side of the blade. I sink the washers down so that they and the blade are the identical thickness because the stand-offs. You need the house between the blade and washer to be equal to the house between the stand-off s or spacer materials. Drill and ream a 3/16-inch pivot gap within the blade. Mill a half-moon slot for the 1/8-inch cease pin.

Many manufacturers put the pin within the deal with at in regards to the 7 o’clock place when open. Grind the pivot and cease pins right down to the right size. (Writer’s notice: Grind the pivot pin so it isn’t uncovered previous the highest of the countersunk gap of the pivot screw. Grind the cease pin so it floats between the 2 scales.) Grind the 2-56 screws down so they do not contact one another after they’re screwed into the stand-offs.

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Profile the blade and grind the tang at a 7-degree angle. I take advantage of a 7-degree block of Micarta® held up towards my disc grinder for a information.

Lock & Detent

knife grinding tips
Grind the tang to suit the lock.

Now it is time to minimize the lock. Place the blade on the underside liner with the pivot and cease pins in place. Open the blade and scribe a line with an X-acto™ Knife behind the tang onto the liner. Draw a line 3 inches lengthy with a marker down the dimensions. Clamp within the mill, and, utilizing a slitting noticed, minimize the 3-inch size. Use a band noticed to chop the brief face, which would be the lock. Utilizing a cut-off -wheel attachment in a Dremel® Software, clear up the tip of the lock.

On a locking-liner or flipper folder, the lock is made by bending a tab of the titanium liner over so it engages with the tip of the tang of the blade. The tip of this tab have to be coated with carbide. The machine that does it is a little hand-held micro welder and is named a carburizer. Merely run the rod onto the tip of the titanium lock and it welds a coating of carbide onto the titanium. This produces a smoother motion on the folder.

You may also flame harden the lock by heating it till it turns orange. With a purpose to let the lockbar bend, grind in a .020-inch dent with a ¾-inch wheel on the different finish of the lock.

It is time to drill holes within the lock and blade for the 1/16-inch detent ball. Heart punch a gap in the course of the lock. Drill by way of with a #54 drill bit.

Shut the folder and clamp it closed. Drill by way of the identical gap because the liner into the blade about .060-inch deep. The #54 drill bit is .053 inch. You may also use a .054- or .055-inch drill bit relying on the way you need to tune your folder. Grind, warmth deal with and polish the blade. Press the 1/16-inch ball bearing into the lock. The peak left remaining of the ball bearing ought to equal the thickness of the washer.

Bend the lock over to in regards to the center of the folder. Now grind the tang at 7 levels on a disc grinder till the lock begins to seize. You may assemble the folder, maintain it as much as the sunshine and push the lock away from the knife to see how way more you must grind the tang. Go gradual and grind just a bit earlier than checking the lock. Drill and faucet the dimensions for the pocket clip.

Sand & Polish

Lastly, sand and polish the whole lot. I additionally polish the ends of the screws. After assembling the folder, tighten the underside pivot screw and regulate the tightening of the folder motion with the highest screw. Use Loctite© glue on all of the screws.

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tips for making knives

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