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- Aug 13, 2020
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A thread discussing the actual build is included below. This thread has been dedicated to the design and organizational phase of the project. Read this thread to understand what we are discussing in the follow on thread here:
This is a follow on thread to the one started by GunOfNavarone.
Join this thread if you would like to join in on the construction of a dividing head.
One of the HM members, Mark_f, shared the process of building his dividing head. Please read the thread so that we're all have a basic understanding of what will be involved, what the end product will look like, and share a common nomenclature.
To begin with, I already have a 40:1 worm gear, and the material and tooling to make several more from 7071 alloy aluminum. This piece is 1.000" inch thick, 3.185" diameter.
The worm is a piece of 1" acme rod that is 1" long. I drilled and tapped the set I have for a 3/8 bolt, but that can be modified. I have material for 9 more pieces.
My shaft is 1.5" CRS, 4.5" long, threaded at 8tpi. I have the material for 2 more pieces. Mark_f bored his out for 3C collets. I have MT3 on my lathe and mill. Would this feature be best left to the final owner?
I'd like to start with Mark_f's design but improve/simplify it with hindsight. For instance:
- the trunnion cap and disk mount arm can be one piece?
- the trunnion can be shortened to eliminate the need for the base extension?
- a pin can be incorporated into the second support to allow the trunnion to be locked into multiple positions?
- the worm can be internal threaded to eliminate the need for the nut on the crank arm?
Group Project: Dividing Head - The Build
This will be the build thread for the group built Dividing head we will all be posting notes, pics, vids? of our progress, there can also be discussion about setups or how to do some things, order of operations or anything else that comes up pertaining to making the parts. The original thread...
www.hobby-machinist.com
This is a follow on thread to the one started by GunOfNavarone.
The madness needs to stop...how about a GROUP PROJECT?
The "madness"? I see it a lot here and it's 90% what I spend my free time doing, making tools or making tools to make my tools better. Alright, it keeps us off the streets and we are enjoying ourselves, no harm no foul. What if we spent some time making forum tools? If you've seen TOT or...
www.hobby-machinist.com
Join this thread if you would like to join in on the construction of a dividing head.
One of the HM members, Mark_f, shared the process of building his dividing head. Please read the thread so that we're all have a basic understanding of what will be involved, what the end product will look like, and share a common nomenclature.
To begin with, I already have a 40:1 worm gear, and the material and tooling to make several more from 7071 alloy aluminum. This piece is 1.000" inch thick, 3.185" diameter.
The worm is a piece of 1" acme rod that is 1" long. I drilled and tapped the set I have for a 3/8 bolt, but that can be modified. I have material for 9 more pieces.
My shaft is 1.5" CRS, 4.5" long, threaded at 8tpi. I have the material for 2 more pieces. Mark_f bored his out for 3C collets. I have MT3 on my lathe and mill. Would this feature be best left to the final owner?
I'd like to start with Mark_f's design but improve/simplify it with hindsight. For instance:
- the trunnion cap and disk mount arm can be one piece?
- the trunnion can be shortened to eliminate the need for the base extension?
- a pin can be incorporated into the second support to allow the trunnion to be locked into multiple positions?
- the worm can be internal threaded to eliminate the need for the nut on the crank arm?
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