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How to make a metal lathe knob turner

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This is my finished  ball and knob turner. You can make knobs out of any material you want . Brass,plastic,aluminum,steel , wood .This style of turner i can create a ball  up to 1 1/4 inch round.
 
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Step 1: Ball turner base plan

Picture of Ball turner base plan
Here are the plans for the base of the ball turner which goes into the cross slide  of the lathe .

Step 2: Machining the base

Picture of Machining the base
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pic#1 shows the 1 1/4 inch height i have to maintain and the end of the project.
#2shows milling the edges square
#3 shows milling the a edge slots that fit in the cross feed ..
#4 shows the top milled flush with the cross feed and it fits very snug.

Step 3: Hub for turner rotor

Picture of Hub for turner rotor
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Step 4: Ball turner rotor plan

Picture of Ball turner rotor plan
Here is the detailed plans for the  cutter rotor

Step 5: Making the Rotor

Picture of Making the Rotor
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pic #1 shows the rotor being drilled through with a  1/4 inch tap drill  and will be threaded  1/4x20
 #2 Shows boring a hole  1 1/4 wide by 3/8's deep to fit a bearing.
#3 shows the rotor with the 1 1/4  outside diameter  x 3/8's thick  x 1/2 inside diameter  bearing press fitted flush to the bottom edge.

Step 6: Milling the rotor

Picture of Milling the rotor
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 pic#1 shows milling the center of the rotor which will help the cutter slide on center of the rotor.
#2,3,4  Show milling the rotor to the correct size for  clearance   to cut the knobs

Step 7: Ball turner bit plan

Picture of Ball turner bit plan
Here is the detailed plan for the turner bit

Step 8: Making the cutter bit bracket

Picture of Making the cutter bit  bracket
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pic #1 , 2  shows milling the stock to make sure the edges are square
#3 Shows the milled slot for the carbide bit will sit.
#4 ,5  show the bracket milled to the proper thickness.
#6 Shows the 1/4 inch milled adjustment slots .

Step 9: 1/4 and 3/8 inch threaded knob arbors

Picture of 1/4 and 3/8 inch threaded knob arbors
 Here is the plan for the arbors for different size threaded knobs.

Step 10: Finished video of the knob turner turning a 1 '' aluminum knob

The_Tom3 months ago
What size lathe is this for? i need one for a 7x 10 lathe
coolbeansbaby68 (author)  The_Tom3 months ago

This is a 12 x 36 lathe .

vincent75202 years ago
great !!!…
but one question remains to be answered : how did you make the first knob as your tool handle ?
A bit like the chicken and the egg, I must say…

Great job.

Thank you !…
coolbeansbaby68 (author)  vincent75202 years ago
i actually had a knob i just put on there to make the first one . The threads didnt even match....
nice !…
have a good afternoon (or so …in europe it's already 8:30pm)
coolbeansbaby68 (author)  vincent75202 years ago
I build another ball turner which is more like the ones you see online .Which i have to take the compound off .I can send you a link if you like ?

www.redneckgadgets.weebly.com please leave a comment if ya like ..
Jim
pfred22 years ago
I started reading the related sidebar and I was like related to outhouses and toilet and camping? Then I made it to survival and I cracked up! I was like yup, I have to agree it'd be tough to survive without balls!
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coolbeansbaby68 (author)  pfred22 years ago
sorry i have a paragraph saved so i just copy it and paste it ...
I figured the Instructables robot was on the blink.
heathbar642 years ago
You've got BALLs!!
one of those would make a really sweet shift knob.
I'm thinking I could use this idea with a wood lathe to make wood balls.
coolbeansbaby68 (author)  heathbar642 years ago
It will cut wooden knobs also
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