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My Attempt
Darren:
I'm having a job to figure out what's being described here... :scratch:
:worthless:
NickG:
--- Quote from: Darren on July 21, 2009, 05:37:53 AM ---I'm having a job to figure out what's being described here... :scratch:
:worthless:
--- End quote ---
True!! I'm struggling too with the hole making device thingy!
Dave, I was going to ask if it had a flywheel! Can you do another pic from the other side? It will run much better with a flywheel you know!
With regards to boring blind holes, I think it's easier to go right through too. When you get into a corner you can get a lot of chatter / build up of swarf that could give the hole different dimensions near that end. I think it's better practice to go right through? Anyone else have any thoughts?
Nick
Bluechip:
Hi Folks
No, no flywheel as yet, I'm a bit stuffed for time this week, due to life's various aggravations. Will do a pic of it's rear end, not much to see, as I said, it's just a 'Junk Box' special.
I think Foozer/Robert/Bernd et al is referring to using a Saw Plate, or anything similar, as an Ersatz Dividing Plate.
All you need is some sort of hub disc to centre it, and another device to serve as a detent, then off you go.
You have a cheap but effective means of dividing. Depending on the No. of teeth on the saw, you can divide.
ie a 72 tooth blade ( fine finish cut ) will give 2,3,4,6,9,12,18,24,36 divs. ( I think ). Factorise the bugger for yourself :D :D
T'other way is to get a length of bandsaw blade and cut off the number of gullets you want ie.
Say 93 divs with a 10 tpi blade. you will cut off 9.3" or very nearly.
Put a disc of MDF or similar, on the lathe, turn OD so that blade exactly wraps, secure blade to disc. Make some sort of detent, and you can make a 93t gear or whatever to a fair accuracy. Never done it myself, seen it done by an old geezer who did Orrerys ( look it up )
Don't use a skip-tooth Blade :D
That's for folk who don't have a Dividing Head, all the div. plates, and the savvy to work out how to use 'em ..
IE ME !!!
Dave
Darren:
Ah, gotcha... :D
Thanks for the explanation, I understand now...... :nrocks:
Bluechip:
--- Quote from: Stilldrillin on July 21, 2009, 05:35:25 AM ---Dave!
Sorry Mate....... Only just seen this! :doh:
Very nicely done! :clap:
Re. bores/ boring.
I`ve got lots of reamers which used to produce mirror finish holes from 10mm to 20mm. Let me know what size will be of use, next time.... :thumbup:
David D
--- End quote ---
Dave SD
Not surprised you've missed the post .. your new pastime of ' Hunt the Chuck Key' ??? :D :D
PM Sent BTW
I've got lots of reamers that produce mirror finish holes, and an attractive chatter pattern. I never get a good finish with mine.'cept in FCMS.
I've no idea why. I have been told only to cut the last .002" with reamer, otherwise it'll leave chatter marks. Others told me to make the reamer work, otherwise it'll leave ...etc. etc.
In my case they're both right :( :(
Dave
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