LumberJocks

Khaya knob for spice grinder

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Project by Dave Polaschek posted 10-25-2021 05:16 PM 521 views 0 times favorited 23 comments Add to Favorites Watch

I have a CrushGrind coffee grinder I bought way back when they did their Kickstarter. I use it for grinding spices. Yesterday I dropped it and the plastic knob that came with it broke, so today I decided to fix that.

I had a piece of Khaya (African mahogany) about 2×2x4 inches, and I chucked it up in the lathe. Used my parting tool to narrow down the tailstock end to fit the metal handle the knob will attach to. Since I was planning to use an 8d wire nail as a shaft (they’re just a hair over 1/8 inch diameter), I got a 5/32 bit in the chuck in the tailstock of the lathe, and drilled a hole through the knob to be. Then I went back to the live center in the tailstock, putting it into the hole I had just drilled. Then I turned the knob. I roughed it with a spindle gouge and parting tool, then turned most of it with a 3/4” skew. Only had a couple catches… on the second knob I turned. I also intentionally left a flat spot on the turned knob so it won’t roll around in the cupboard. It feels pretty good in the hand that way, too.

With most of the knob shaped, I finished it with Ack’s Abrasive Paste to do a grain fill, then a coat of linseed oil, a coat of 1# cut of shellac, a second coat of linseed oil, and finally finished it with the Ack’s Polish. Then I parted off the knob at what would be its top.

I turned the knob around, chucking it up in my smallest chuck, which goes up to about 3/4 inch. Put the chuck with the 5/32 bit back in the tailstock and cleaned up the hole, then put a 3/8 bit in the chuck, and made a recess for the head of the nail. Then I sanded the top of the knob with 60, 120, and 180 grits, followed by the same finishing process.

That done, I put the nail through the knob and handle, clipped off about 1/8 inch of the point of the nail, and tap-tap-tapped it with the ball-peen hammer until it wouldn’t pull out. It’s a little loose, but it works great, and feels a lot better in the hand than the plastic knob ever did.

Little projects sometimes make for big satisfaction.

-- Dave - Santa Fe





23 comments so far

View doubleDD's profile

doubleDD

10801 posts in 3330 days


#1 posted 10-25-2021 05:40 PM

Looks perfect Dave. That’s one of the fun parts of having a lathe. I love when a handle breaks or wears out.
Just questioning if you have enough finish on it. LOL.

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View recycle1943's profile

recycle1943

5971 posts in 2909 days


#2 posted 10-25-2021 06:02 PM

sometimes fixing is more rewarding than inventing – good job Dave

-- Dick, Malvern Ohio - my biggest fear is that when I die, my wife sells my toys for what I told her I paid for them

View Dave Polaschek's profile (online now)

Dave Polaschek

8809 posts in 1869 days


#3 posted 10-25-2021 06:07 PM

Thanks, Dave! I’m with ya on that. Only problem is not all my handles can be turned, so some breakages are a lot more work. It’s actually not much finish. Basically a friction finish plus wax. And it only took a few minutes.

Thanks, Dick! It’s also nice to have something that’s DONE without lots of monkeying around.

-- Dave - Santa Fe

View MikeB_UK's profile

MikeB_UK

732 posts in 2321 days


#4 posted 10-25-2021 06:45 PM

Nice save.

Thought it was massivly overpriced until I realised the price was in Krone in the link :)

-- Be yourself; everyone else is already taken.

View Oldtool's profile

Oldtool

3354 posts in 3477 days


#5 posted 10-25-2021 07:10 PM

Nice save, very resourceful.

-- "I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The point is to bring them the real facts." - Abraham Lincoln

View oldrivers's profile

oldrivers

2808 posts in 2853 days


#6 posted 10-25-2021 07:11 PM

Way to go Dave. repairs are often times better that the original now days.

-- Soli Deo gloria!

View Dave Polaschek's profile (online now)

Dave Polaschek

8809 posts in 1869 days


#7 posted 10-25-2021 07:39 PM

Thanks, Mike. Yeah, I had to order a replacement bowl for it too (I’m not good enough to cut the threads for that just yet), and when I first looked at the price, it was shopping in Lira in the 80s. Way too many digits.

Thanks, Tom!

Thanks, Oldrivers! The plastic knob wasn’t BAD, but it wasn’t especially nice, either.

-- Dave - Santa Fe

View robscastle's profile

robscastle

8297 posts in 3491 days


#8 posted 10-25-2021 10:37 PM

That’s a good looking Knob Dave!

I see you outlayed about $83 AUD or $62.42 USD for the grinder so its well worth recovering

I may see if I can source ACK’s Abrasive Paste regardless of the freight costs because I would like a new car too.

Did you grind up any of the yellow bush ?

-- Regards Rob

View pottz's profile

pottz

21350 posts in 2271 days


#9 posted 10-25-2021 10:58 PM



That s a good looking Knob Dave!

I see you outlayed about $83 AUD or $62.42 USD for the grinder so its well worth recovering

I may see if I can source ACK s Abrasive Paste regardless of the freight costs because I would like a new car too.

Did you grind up any of the yellow bush ?

- robscastle


rc you checking out daves knob ? and how much yellow bush you smoke.oh, it is a nice knob dave.

-- working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

View Dave Polaschek's profile (online now)

Dave Polaschek

8809 posts in 1869 days


#10 posted 10-25-2021 11:32 PM

Thanks! I think it was about USD40 for the Kickstarter version, Rob.

Thanks, Pottz! My sweetie likes it too, so a win all around.

-- Dave - Santa Fe

View NormG's profile

NormG

6574 posts in 4290 days


#11 posted 10-26-2021 12:04 AM

Looks great, thank you for sharing

-- Norman - I never never make a mistake, I just change the design.

View Dave Polaschek's profile (online now)

Dave Polaschek

8809 posts in 1869 days


#12 posted 10-26-2021 12:51 AM

Thanks, Norm!

-- Dave - Santa Fe

View BB1's profile

BB1

2560 posts in 2134 days


#13 posted 10-26-2021 01:51 AM

I love “home projects” like this. You’ll smile each time you use it knowing it is better than the original. :)

View crowie's profile

crowie

5111 posts in 3237 days


#14 posted 10-26-2021 06:34 AM

Better than new now and looks good to boot!

-- Lifes good, Enjoy each new day...... Cheers from "On Top DownUnder" Crowie

View Dave Polaschek's profile (online now)

Dave Polaschek

8809 posts in 1869 days


#15 posted 10-26-2021 11:21 AM

Thanks Barb! Yeah, it’ll be nice to use and it was a good change of pace in the shop.

Thanks, Peter! I really like a friction finish on the lathe because it goes from naked to done so darned quick.

-- Dave - Santa Fe

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