Supporting > Tooling & Machines
D1-4 chuck adapter for rotary table
Mike R:
I started making this adapter plate for my rotary table as I have a new to me lathe that has a D1-4 camlock spindle and the chucks wouldn't fit on the rotary table anymore unlike my plain back chuck on my previous lathe. Not wanting to buy chucks just for the rotary table I search for a solution (ie commercial adapter) but came up empty handed. So I have started to build my own.
I need to credit DeereGuy over on MadModder for the "idea" of making my own. I tried contacting him to get a copy of his drawings that he was passing out previously but to no avail so I made my own drawings. I needed to purchase the spec from ASME for the spindle nose to get just one of the dimensions as I had no luck finding it online and my ability to measure my spindle was lacking (ability refering to tools and skill!)
So with the spec in hand I whipped up a CAD model of what I wanted to make and set about buying a lump of steel to make it from. Around here $29 Cdn gets you a lump of 1018 HRS 5" dia by 2" thick.
Cleaned up it was 4.980" diameter so I adjusted my model to reflect the cleaned up dimension and machined the taper on the front.
I was trying to not have 20 thou (10 on the radius) be a problem and it seems that I escaped a serious boo-boo by using 5". The mounting holes to the rotary table are mighty close to other holes in the adapter. 5.25" or 5 1/2"would have been a better choice from that perspective.
I am waiting to machine the camlock holes till I receive the camlocks (ordered them from Grizzly). I am hoping they are made to the ASME spec but being parts for a Chinese lathe I don't want to risk it! The parts are supposed to be here Wednesday (likely Thursday as I will need to pick them up from UPS) so I'll know then if they are a match to the spec or if mine will be a custom build to fit them.
Attached is a 3d pdf of what the finished part should look like. I'll try my hand at making some 3-view drawings with dimensions but its been many years since I did that in school and I've never done it with this software so I may not succeed!
Mike R
Bogstandard:
Mike,
It was because of the problems of making the D1-4 holder, and loss of a lot of throat depth on my mill that I took the easy way out, and went for a removable Myford nose conversion for my lathe, and subsequent conversion of all the tooling for the mill.
Bob actually went into production with his version, making them out of ali and hard anodising them, I haven't heard from him on Skype for ages, so I can't help on that score.
John
Mike R:
John,
I realize there is a loss of a little bit of extra Z depth with the adapter but my mill has ~ 20" of height there so unless I'm trying to use it on something really big / long it will be ok. Plus I envision using it with the axis parallel to X axis for adding flats to round items, etc.
It is a little bit challenging to make but that is part of the fun! Hopefully I don't need to make it again though - just need to be very carefull on these last few operations.
I thought I'd make it from steel and get it nitride hardened after I was (done for durability), but my choice of steel was poor. I learned after that 1018 is a poor choice for nitride hardening. Fortunately it won't be subject to much wear and I just need to be carefull to not damage it while changing chucks. Worst case is I need to skim the face back and touch up the taper to get it back in shape if it does get dinged or wear...
As I said, I tried to contact Bob but his website is gone too.
Mike
Mike R:
Received the camlocks from Grizzly today. They deviate from the spec but not in any way that appears to be critical. Tried them in my spindle and they work! So I can continue on and make the holes for them in the adapter as per spec. I do need to update my model / drawing to show a metric thread as that is what I purchase from Grizzly (purely out of convenience) - again that does not really make any difference to the final function of the adapter.
You can see in this photo the camlock on the left is from my lathe and the one on the right is from Grizzly for their G4003 lathe. The cutaway is slightly larger, its missing about 0.050" at the top and teh cam area is a bit narrower but the rest seems to be fine. I guess that is the difference between a $7 a piece and $19 (from Mac-it.com). I almost ordered the more expensive ones but ran into the typical "I live outside the USA" problem and gave up...
These are again my lathe pieces on left and the new ones on the right. The most obvious difference is the spring. At least I can cut it down if its too big!
Mike
Mike R:
I've attached a PDF drawing of the adapter - the drawing is less than perfect as I struggle to learn the Fusion 360 drawing side of things.
Any questions just ask.
Mike
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