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intermediateDIY Tools & Jigs23-Apr-2017

Homemade Carbide Wood Lathe Tool

TinksterBot

Earth

3-5 hours

$30-60

Original Project by Bruceputman from Instructables.

Source: https://www.instructables.com/Homemade-Carbide-Wood-Lathe-Tool

License: Attribution-NonCommercial-ShareAlike

I purchased a Carbide Insert Lathe Tool which can be seen in the top of the photo and decided that I wanted to make a better one using hard woods and Stainless Steal

Steps

Parts List for Tool

There are not a lot of parts needed to make a nice Wood Lathe Tool

1. Description: Nut, Type Compression, Tube Size 3/4 In., Tube Outside Dia. 3/4 In., Thread Size 1-18, Thread Connection, Material of Construction Brass

Purchased: www.zoro.com

Model #: G3942032

Price: $1.53 ea

2. Description: 0.375" T-304 Annealed Stainless Square Rod, Random Length (10"-12")

Purchased: www.onlinemetals.com

Model #: N/A

Price: $ 3.78 ea

3. Description: 11 x 11 x 2 R50 Carbide Insert 6.5% colbolt

Purchased: eBay Putm-Bruc seller - Drop me a note if you would like to buy some

Model #: N/A

Price: $ 4.95 ea

4. Description: 8-32 Flush Head Stainless Steal screw

Purchased: Denault Hardware

Model #: N/A

Price: $ 0.33 ea

5. Description: Wood ( Wild Almond and Iron Wood )

Purchased: eBay

Model #: N/A

Price: $20 for both

6. Description: Rubber Washer 9.5 x 17.5 x 4 mm

Purchased: www.HarborFreight.com

Model #: N/A

Price: $3.99 set

Tools That I Used for This Project, These Can Be Replaced by Others.

+22

Photo 1: Jet Mini Lathe - Woodcraft

Photos 2-3: Powermatic (1971) Bandsaw - Craigslist

Photo 4: 12" Ridgid Miter saw - Home Depot

Photo 5: Shop fox Drill Press - Amazon

Photo 6: Jet 12" Disc Sander - Woodcraft

Photo 7: Jet parallel Clamp 12" or larger - Woodcraft

Photo 8: Files.. Course, Medium and Fine - Woodcraft

Photo 9: Countersink with tool to apply it - Woodcraft

Photo 10: Tap Handel with 8-32 tap - Lowes

Photo 11: Grinder - Sears

Photo 12: Metal vice and hand held disc grinder - Harbor Freight

Photo 13: 3/8" Chisel - Woodcraft

Photo 14: Plastic Mallet - Woodcraft

Photo 15: Wire wheel - Home Depot

Photo 16: Lathe Caliper - Woodcraft

Photo 17: Large adjustable Wrench 1 1/2" Capacity - Lowes

Photo 18: 2 Jorgensen Clamps - Woodcraft

Photo 19: Gorilla Glue - Woodcraft

Photo 20: Tap Magic - Anazon

Photo 21: Medium CA Glue - Woodcraft

Photo 22: Thin CA Glue - Woodcraft

Photo 23: EEE Ultra Shine - Woodcraft

Photo 24: Gloves and scissors - Lowes

Photo 25: Wax paper - Vons

Photo 26: Tape Measure - Woodcraft

Photo 27: 6 inch scale - Woodcraft

Cutting Wood to Size

I cut the wood into 1 1/2" x 1 1/2" x 6 " pieces using my 1971 Powermatic Bandsaw and Ridgid 12" Chop saw.

Gluing the Wood Together

+14

I use gorilla glue to glue the 2 sections together.

This requires wetting the surfaces with water befor gluing..

I use parallel clamps to assure the parts stay square to one another and place wax paper on the clamp where the glue joint is to eliminate the need to scrape glue off the clamp

Prepping the 3/8" X 3/8" Stainless Bar

For the Stainless bar, I needed at least 10", so when I purchased them I choose random lengths from 10 to 12 inches.

As you can see from the photo, mine were cut to 11 inches.

As the ends we're rough cut, I used a file to smooth them.

Drilling - Learning - Drilling

I must say I learned a lot about 304 SS..

I started out drilling the holes for a 6-32 tap.. what I found is 304 SS work hardens fairly easily.

I read that when you drill SS you need keep the speed slow, 200 - 300 RPM, and use cooling fluid, oil and press hard.

You drill wood at approx. 1500 RPM's and you don't drive the drill by pressing too hard, plus you pull the bit out frequently to remove wood chips.

When I drilled the 6-32 tap hole I drilled through the material too slow. The good news it just work hardens in a local area, so drilling out for an 8-32 tap I drilled through quickly while sucking air over the metal with a shop vacuum.

Photos 1-8 are drilling the SS for a 6-32 tap

Photo 9 is a broken 6-32 tap

Photos 10-12 are drilling the SS for a 8-32 tap

Tapping the SS Bar With a 8-32 Tap

Prior to Tapping, I used a countersink to help with starting the tap and also giving room for the screw.

I used tap magic on the tap and assured I removed metal chips as I cut.

Marking and Grinding to Place the Carbide Insert Flush With the Top of the SS

+14

Photos 1-7 are showing how I marked the SS to Grind for the carbide insert

Photos 8-9 show clamping a piece of maple to the SS to Grind it.. This did 2 things, one it produced a stop for Grinding and two allows me to hold the SS as it gets very hot.

Photos 10-12 show Grinding

Photos 13-17 show the ground SS before it is filed.

Photos 18-19 show the final cut, that has been filed and fitted with a carbide insert.

Cutting the SS to Length

Measuring the Wood Turning Tool, it had 4 1/2" from the handle out. As I wanted 4 to 5 inches remaining in the handle I decided to cut the 304 SS to 9 inches.

I used a hand grinder and a vice to cut each piece to 9"

I then ground the end I cut in a bench grinder.

Trimming the Glued Wood

Using the bandsaw, I trim off the foam from the gorilla glue and cut the corners off which I find is easier than doing it on the Lathe

Photos 3-7 show the trimming of the corners and results

Marking the Centers, Tapping in the Spur Center and Mounting to the Lathe

I first mark an X for the center of the spindle piece, photo 1.. note that this could have been done before the last step in cutting the corners off, but since I have a lot of extra wood for turning I was not that concerned to getting it exact.

Photo 2 shows the spur center tapped in with a hammer. You can also make your X and then cut it on the bandsaw.

Photos 3-4 show the spindle mounted on the Lathe

Measuring the Compression Nut Diameter and Depth and Marking on the Spindle, Turning for the Nut to Be Threaded On.

Now I measure thr brass compression nut thread diameter and depth. I use a Lathe caliper for the diameter and a 6 inch scale for the depth.

Photos 2-3 I mark the depth on the spindle where I turned it round on the end.

Photo 4 turning the spindle to diameter

Photo 5 checking with a caliper

Photos 6-7 I used a large adjustable wrench to thread the brass compression nut on the wood spindle.

Using a Course, Medium and Fine File on the Brass Fitting

With the brass compression nut threaded on the spindle, I use a file to remove the flats on the nut as shown in the photos

Once it is round, I use a med. then fine file to smooth and polish the brass.

Note that I have dust collection hose just under the brass compression nut to remove the brass dust while filing.

Finish Turning the Spindle and Applying CA Glue for the Finish. Polishing With EEE Ultra Shine

As I do a lot of pen turning, I am used to applying CA glue ( AKA Super glue ) to pens.. why not the tool that will turn the pens..

Photos 1-5 show turning the spindle

Photos 6-8 show the spindle with CA glue.. To understand how to apply CA glue, refer to my instructable on making a pen.

Once the CA is applied and sanded, I use EEE UNITA shine to polish the finish.

Drilling for the SS Bar in the Spindle, Cutting, Sanding and Finishing the Spindle End

As my Lathe is a mini Lathe I there is not enough room to mount a drill on it, so I used my drill press to drill a 3/8 hole 5" deep

I could have used a parting tool to remove the end of the spindle but did want to take a chance of denting the brass or wood so I cut it on my bandsaw, photo 3.

Photo 4 shows the end after cutting on the bandsaw

Photo 5 sanding on my 12" disc sander

Photo 6 ready for finish

Photos 7-8 applying thin CA on the end... as this is a bit messy photo 8 shows with cap on.

Using a 3/8 Chisel to Square the 3/8 Drilled Hole

If you have a metal Lathe you can replace this with turning the SS bar round on the end that goes into the handle

Hand Grind the 304 SS to Better Fit in the Handle

Photos 1-2 show the Grinding of the bottom end of the 304 SS bar to assure I don't crack the wood while hammering it into the handle

Photos 3-4 shows installing the SS bar. Note that I added CA glue into the sides of the hole befor pushing and hammering in.

That last step was to slide the rubber washer over the 304 SS bar.

Lightly Smooth the Surface of the 304 SS

I mounted a wire wheel on my drill press to lightly smooth the surface of the 304 SS

Conclusion

I've completed all 5 tools... a lot of work, but I am real happy with the finished tools..

If you are interested in buying the carbide inserts or one of the tools, please shoot me a note. I plan to auction 1 of the tools and will be selling the inserts for the remainder of this year depending on demand.

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