Before hollowing the bottom of a bowl I estimate the thickness before putting it on the Cole jaws. Later I forget how much I have to work with. I made a jig to measure the inside depth before reversing the bowl, then check the bottom thickness as I hollow it.
Pictures at 11 on ABPW
Pounding the pulpit in news:42bacdd3$1 snipped-for-privacy@spool9-west.superfeed.net, Gerald Ross did expound thusly:
You hollow bowls on Cole jaws? Wow, I'd like to see /your/ lathe... :D
Good idea, I'm embarrased I hadn't thought of it myself! All too often I've turned off a foot or tenon to discover myself the proud owner of an ornamental funnel... [sigh]
Well, I don't like to leave the bottom flat. I turn it flat, then scoop out the center part, leaving a quarter inch rim as a foot.
Pounding the pulpit in news:42bc1159$1 snipped-for-privacy@spool9-west.superfeed.net, Gerald Ross did expound thusly:
Ahhhh... I see. Personally I'd call that "trimming" rather than hollowing; to me hollowing means major excavation, but I know what you mean and do the same... I assume most other turners do, too.
I just had this picture in my head of a bloke trying to hollow out a blank through the headstock spindle...
Sort of like 'tighten it down until it strips and then back it off a half turn'.
Bill
Chuck wrote:
I've always used daylight, myself. At least it tells me when I've gone too far.
Isn't that why they're hollow? I just sharpened the end of the ram rod that came with the lathe, that's made to go through the head stock.. Shaving removal is sort of slow, too..
mac
Please remove splinters before emailing
I thought you had a vacuum fitting?
nope.. I was the one that thought that they were too expensive, until the vacuum thread... now, I'm just too lazy to build one...
mac
Please remove splinters before emailing
Ah. I was like that, but now I'm too lazy to procrastinate.
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