Re: Thread size for clamp kit
??? ??? I had totally forgotten about this & if you plan to
make your own? t-nuts? ( which is much cheaper then buying them if
you have the material ) keep in mind that you should peen the
bottom
??? ??? of the thread in the nut for table protection .
??? ??? animal
On 5/7/2022 5:06 PM, Steve Simpson
wrote:
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T-nuts sometimes come with the threads upset on the bottom or not
completely threaded through. This is to keep the user from
threading all the way through the t-nut and then jacking the t-nut
into the bottom of the table. I have seen pictures of tables with
a chunk of the slot missing where this was taken to an extreme.
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Re: Thread size for clamp kit
I would make nuts to fit.
I use O1 or W1 tool steel for nut.
Dave?
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Re: Thread size for clamp kit
T-nuts sometimes come with the threads upset on the bottom or not completely threaded through. This is to keep the user from threading all the way through the t-nut and then jacking the t-nut into the bottom of the table. I have seen pictures of tables with a chunk of the slot missing where this was taken to an extreme.
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Re: Thread size for clamp kit
If you are referring to the T-nuts, they are purposely crimped at the bottom so that a bolt will not continue threading through, which could force the T-nut to push up and fracture the top of the T-slots in your cast iron table. But the hex nuts should allow a bolt to pass through completely.
John
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Re: Thread size for clamp kit
I forgot to mention that I have many 3/8-16 bolts in my workshop, and they are an excellent match when pressed together side by side with the bolts from the kit. No way I should be looking for something like 24 tpi. Also, there is a bit of variation between different nut/bolt combinations within the kit. And, with the kit bolts as well as with my 3/8-16's, in most cases it seems much harder to put the bolt in from the bottom of the nut. Maybe the kit manufacturer intentionally made the female threads to seize before they get in far enough to touch the bottom of the slot (and prevent the nut from sliding in the slot)? Come to think of it, when I use a second nut on the top of a bolt, I would probably be thankful for the bolt seizing in the lower nut. If this is the explanation, there still seems to be a case of sloppy tolerances in manufacturing...
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Re: Thread size for clamp kit
The M10 being too big would make sense.? 3/8 inch = 9.5 mm.
Put a scale and a dial caliper on your bolts and tell us what you get.? There are two thread pitches fairly easy to get on 3/8":? ?Coarse (UNC) 16 TPI and Fine (UNF) 24 TPI.
Easy to forget, but when you post a question, try to remember to tell all you've done right from the start (like the trip to Ace).
Hank ____________________________________
On Saturday, May 7, 2022, 06:33:31 PM EDT, azk7tv <ebasilier@...> wrote:
I went to ACE hardware and tried M10 bolts with two different pitches. They were both too thick to even start going in.
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Re: Thread size for clamp kit
??? ??? take the nut to the hardware store & see what fit's
it . They do make/sell metric holdown kits
??? ??? animal
On 5/7/2022 2:31 PM, azk7tv wrote:
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I have a HF mini-mill with the usual 7/16 slots, and a matching
clamp kit. The studs that came with the kit are supposedly 3/8-16,
and they work with the supplied nuts. However, to mount my angle
plate on the table I need shorter bolts, with heads. When I try
standard 3/8 bolts from other sources, the threads don't match
exactly. A bolt gets stuck after going half way through a nut. Has
anyone else had this problem? Do I need to get bolts manufactured
to a special standard? Thanks in advance for any comments.
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Re: Thread size for clamp kit
I went to ACE hardware and tried M10 bolts with two different pitches. They were both too thick to even start going in.
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Re: Thread size for clamp kit
Yes, the common 16 per inch threads are incredibly close. The bolt goes in quite far before it gets stuck.
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Re: Thread size for clamp kit
Have you tried an m10 bolt? ? On Sat, May 7, 2022 at 6:11 PM Jonathan Mackenzie via <jonathanmackenzie= [email protected]> wrote:
Are the standard bolts you are trying to use 16 pitches per inch? Sounds like you might have a mismatch there.
On Saturday, May 7, 2022, 03:00:11 PM PDT, azk7tv < ebasilier@...> wrote:
I have a HF mini-mill with the usual 7/16 slots, and a matching clamp kit. The studs that came with the kit are supposedly 3/8-16, and they work with the supplied nuts. However, to mount my angle plate on the table I need shorter bolts, with heads. When I try standard 3/8 bolts from other sources, the threads don't match exactly. A bolt gets stuck after going half way through a nut. Has anyone else had this problem? Do I need to get bolts manufactured to a special standard? Thanks in advance for any comments.
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Re: Thread size for clamp kit
Are the standard bolts you are trying to use 16 pitches per inch? Sounds like you might have a mismatch there.
On Saturday, May 7, 2022, 03:00:11 PM PDT, azk7tv <ebasilier@...> wrote:
I have a HF mini-mill with the usual 7/16 slots, and a matching clamp kit. The studs that came with the kit are supposedly 3/8-16, and they work with the supplied nuts. However, to mount my angle plate on the table I need shorter bolts, with heads. When I try standard 3/8 bolts from other sources, the threads don't match exactly. A bolt gets stuck after going half way through a nut. Has anyone else had this problem? Do I need to get bolts manufactured to a special standard? Thanks in advance for any comments.
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Thread size for clamp kit
I have a HF mini-mill with the usual 7/16 slots, and a matching clamp kit. The studs that came with the kit are supposedly 3/8-16, and they work with the supplied nuts. However, to mount my angle plate on the table I need shorter bolts, with heads. When I try standard 3/8 bolts from other sources, the threads don't match exactly. A bolt gets stuck after going half way through a nut. Has anyone else had this problem? Do I need to get bolts manufactured to a special standard? Thanks in advance for any comments.
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I WANT a 4" dividing head for mine. What I'll probably have to settle for is a copy of the #0 or 5" Brown & Sharpe dividing head, or build one of my own. I've got a 3" rotary table, no plates or tailstock, that might work but haven't gotten to play with it yet. Don't hold your breath waiting! I think the 5" will be too big, and the 3" maybe too small for the Mini-Mills. Though if you want to cut gears for something like an Atlas, SB, or Logan lathe, 5" would be about the minimum if you want to do metric transposition gears. The DP 16 127-tooth gear is over 9" in diameter, and that is what the Atlas needs. Not sure about Logan lathes, but the SB Heavy 10L I have supposedly has DP 18 gears. At some point in time I'd like to have metric transposition gears for both lathes. A 127 & 100 tooth gears are the usual way to do it. Still reading and learning, got a long way to go, and YMMV!
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better
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On Monday, February 21, 2022, 10:08:03 AM CST, Bruce Casey <bcasey59@...> wrote:
I have a Harbor Freight Mini Mill.? ?I want a rotary table with divider plates ?? Is anyone using one if so what size ? Any information would be appreciated ?
Thank you
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I have a Harbor Freight Mini Mill.? ?I want a rotary table with divider plates ?? Is anyone using one if so what size ? Any information would be appreciated ??
Thank you?
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It is the 3 lines next to the phone at the bottom of the page. Then 2/3 of the easy down, on my phone (Android)
--
Kelly Black
USA
HF Mini Lathe & Mill
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what does the link look like on a phone? I donthink there is one
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Click the link at the bottom of the email 'View/Reply Online'. A new tab will open. Click the 'Files' link on the left of the page. And welcome.
- Jonathan
On Thursday, February 10, 2022, 04:39:18 PM PST, m_belfer via groups.io <m_belfer@...> wrote:
Im new here - how do I navigate to the files area?
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Im new here - how do I navigate to the files area?
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Re: WTB: Mini Mill (Philadelphia/East Coast, US)
Thanks Dave.
I am still looking. If anyone has one for sale, please let me know.
Thanks.
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I notice the listing for the mill doesn't give the options.
DRO
tilt head
rotating table
VFD
coolant pump
base
motorized X
motorized Z
automatic tapping (at bottom of travel it reverses and backs out)
After adding things like a DRO to the old mill, my wife and I agreed it
was simpler to just order it with everything now.? Also with students
using it they can learn to use it with and without the extras, like
power off the DRO and make this item.
--
www.DurandInterstellar.com
www.DurandInterstellar.ru
WhatsApp, Telegram, Signal, VK
Goryachiy Klyuch, Russia
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davesmith1800
Chris (CB)
Bill in OKC too
Kjb25
Jerry Durand