Making a few replacement knobs for my parents' 1926 solid wood wardrobe
Difficulty Level (Easy, Medium, Hard, Insane):
Easy
Process:
My parents came for a visit and because they know that I like to work with metal they asked me whether they could get me to make them a few knobs for their wardrobe's door hinges.
Although I had never done curved profile parts, it ended up being pretty easy to do. All I had to do was grind a 5/16" square HSS tool bit to match the original knob and then do the following steps 5 times:
1. Face the 1/2" piece of aluminum
2. Turn it down to .0406" diameter
3. Chamfer the edges
4. Drill with 1/8" drill bit to 0.375" depth
5. Tap the hole using an M4 by 0.7 tap
6. Use the ground form tool to cut the center grove at 0.160"
7. Use the ground form tool to cut the end curve at 0.460"
8. Part it off
9. Finish sand the end on the belt sander
By the time I was at the last piece (they needed 5 parts) I was able to crank out one part in about 7 minutes and they turned out really nice.
Pictures:
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| The original hinge pin with two original end caps |
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| The thread was measured at an M4 by 0.7 metric thread |
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| The 5/16" HSS tool blank with the radius marked |
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| Close-up of the marked HSS tool bit |
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| Marking the lines for the center groove and the end radius |
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| My parents thought I should get in the picture too |
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| Dad trying out the lathe with mom watching |
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| Turning the curved profile into one of the parts |
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| Tapping the hole |
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| A view of the curved profile |
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| The finished parts with one of the original ones (very left) |
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| One new and one old knob mounted on the hinge pin |
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| Another view of the finished parts |
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| Yet another view of the finished parts |
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| Close-up of one of the new pieces |
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| Two knobs on one door hinge pin |
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| Another view of the door |
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| Almost 100 years old |
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| Zoomed out a little bit |
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| The wardrobe in it's 90 year old glory |
Lathe & accessories
Tap & die set
1/8" drill bit
Bench top belt sander
Materials:
3" of 1/2" diameter round solid aluminum
Cost:
$0.00
Time:
1hr
Savings:
No idea. Probably at least $100 if they had to get a machine shop to do it for them.
Conclusion:
I had fun doing it and my parents are happy with the results
1 comments:
Yes we are !!!!!!!!!!!!!!
Finally " my Buffet " is complete again! We are so proud of our son and his abilities . Love you Christian !
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