Re: Hole Saw For Commercial Ektar Lens
If it's a holesaw you have to measure the ACTUAL outside tooth diameter with a caliper. Brands differ, even within the same nominal size. Hole saws are not precise with respect to diameter. Someone might want to debate that, but I doubt they've sold the thousands and thousands of them I have.
Re: Hole Saw For Commercial Ektar Lens
In wood you can cheat a couple of millimeters by rocking the hole saw using a hand drill. I have mostly wooden boards that I get from Zimba (or something like that) off of Ebay. These are machined, lathed, flawless. I will never again hack away at a nice board with a hole saw. Especially a metal board. I found a semi retired machinist who has cut back to 40-50 hours a week. He's helped me with some metal parts, worth every penny.
Still if you want to do it yourself go ahead, caution even clamped and held down its easy to warp metal boards.
Re: Hole Saw For Commercial Ektar Lens
Quote:
Originally Posted by
pendennis
When cutting metal, I always keep the hole saw lubricated with machine oil I've never had a warp. My main concern here was whether the 2" or 50mm hole saw would be correct.
Is this an April Fools joke?
Re: Hole Saw For Commercial Ektar Lens
As Duolab123 said, for a metal board, find a home machinist who can cut a perfect hole for you. It will be worth a couple of bucks versus a hack job you can do with a hole saw.
Re: Hole Saw For Commercial Ektar Lens
In the old days, if not in a hurry I would contact Luland on eBay and ask them to build me a Linhof or Sinar or whatever plate with a custom hole. It’s usually same price as the standard Copal hole sizes. It’s CNC’d and they do a great job. They can also machine custom retaining rings etc
You still can if you don’t mind buying directly from China (and apply whatever handling provisions you are comfortable with).
Turns out it’s cheaper for me than going to a CNC machine shop around my area, they know already what I need without having to provide a drawing, and usually takes about 7-10 days to arrive which is not bad.
Re: Hole Saw For Commercial Ektar Lens
For metal, boring bar on a mill...
For wood, I use a circle cutting attachment on my router... Beautiful hole...
On some retaining rings, there is a shoulder that can go inside the board that is a little bigger than the threads that might be a standard size... Measure that too...
Steve K
Re: Hole Saw For Commercial Ektar Lens
I always like to drill a hole before I drill the hole, a whole lot better hole.
Re: Hole Saw For Commercial Ektar Lens
Quote:
Originally Posted by
seall
I always like to drill a hole before I drill the hole, a whole lot better hole.
A holistic approach, eh?
Re: Hole Saw For Commercial Ektar Lens
Quote:
Originally Posted by
John Kasaian
A holistic approach, eh?
Holy Cow!
Re: Hole Saw For Commercial Ektar Lens
... and now we know the whole story!!