Search found 362 matches

by mklotz
Sun Jan 17, 2021 10:59 am
Forum: The Junk Drawer
Topic: Approaching the Apex
Replies: 4
Views: 251

Re: Approaching the Apex

Image
by mklotz
Wed Dec 23, 2020 1:10 pm
Forum: General Discussion
Topic: Newbie question: finding the right size nut
Replies: 12
Views: 1242

Re: Newbie question: finding the right size nut

You might be surprised at what you can find on Amazon... https://www.amazon.com/s?k=Nuts&rh=p_n_feature_fourteen_browse-bin%3A11434092011%2Cp_n_material_browse%3A17548970011%2Cn%3A16310091%2Cn%3A383599011%2Cn%3A16409861&pd_rd_r=724c26ab-52b7-4b1a-948a-6d51f4aa0e72&pd_rd_w=sLlyZ&pd_rd_wg=hkg2e&pf_rd_...
by mklotz
Thu Dec 10, 2020 1:56 pm
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: Old tools
Replies: 27
Views: 6115

Re: Old tools

These... https://www.chaski.org/homemachinist/download/file.php?id=80237&t=1 are adjustable spanners. Look at a lens retaining ring on a camera or other optical device. You'll notice two slots in the ring periphery. The screwdriver-looking tips on the bottom two wrenches go into such slots and the w...
by mklotz
Thu Nov 26, 2020 2:57 pm
Forum: Live Steam
Topic: Share your special tools
Replies: 37
Views: 10948

Re: Share your special tools

Although I build model stationary engines that run on steam and air, I'm not into railroading. With that said, I document all my homemade tools on (appropriately) homemadetools.net, a forum located here... https://www.homemadetools.net/forum/activity.php If you wish to page through a picture index o...
by mklotz
Thu Nov 26, 2020 12:27 pm
Forum: Live Steam
Topic: Share your special tools
Replies: 37
Views: 10948

Re: Share your special tools

Thanks, Marv. That's a great idea for a quick-and-dirty one in a special size for some one-off job. I'm saving that photo. The staggered length of the jaws allows it to be grasped in a bench vise and thus used for hand work on screws or any other part that has an integral projection like a screw he...
by mklotz
Thu Nov 26, 2020 10:16 am
Forum: Live Steam
Topic: Share your special tools
Replies: 37
Views: 10948

Re: Share your special tools

When grinding or deburring, a lantern pin vise can be a useful tool. Here's my take on one...

https://www.homemadetools.net/forum/lan ... #post85644
by mklotz
Tue Nov 17, 2020 5:42 pm
Forum: The Junk Drawer
Topic: We think we know
Replies: 13
Views: 4239

Re: We think we know

Image
by mklotz
Sat Aug 08, 2020 10:05 am
Forum: Milling Machines
Topic: Reading deg min and seconds
Replies: 19
Views: 5374

Re: Reading deg min and seconds

Here's another way to get a feel for such a small number... Let's say you have an RT with a 90:1 ratio and a crank on the input shaft that has a 1.5" radius. How far must the end of the crank move to rotate the table by one arcsecond ? 4.85E-6 * 90 * 1.5" = 0.00065" or less than a thousandth of an i...
by mklotz
Fri Aug 07, 2020 5:16 pm
Forum: Milling Machines
Topic: Reading deg min and seconds
Replies: 19
Views: 5374

Re: Reading deg min and seconds

I find it hard to believe that you need to be concerned with that sort of accuracy. An arcsecond is 4.85 microradians. At a distance of 100 yards that's an offset of only 0.017 inches. Round off the arcseconds to the nearest arcminute and go with that.
by mklotz
Tue Jul 21, 2020 5:40 pm
Forum: General Discussion
Topic: Split Cotters
Replies: 9
Views: 2292

Re: Split Cotters

liveaboard wrote:
Tue Jul 21, 2020 5:26 pm
I'm having trouble picturing this; can someone maybe post a picture?
https://www.youtube.com/watch?v=DdHd0kJ2_3c

The description of the device starts right around 3:00 into the video.
by mklotz
Fri Oct 11, 2019 11:07 am
Forum: Lathes
Topic: Screwcutting not picking up in the same place
Replies: 19
Views: 8867

Re: Screwcutting not picking up in the same place

charkmandler wrote:
Fri Oct 11, 2019 10:12 am
... I will look in to needing different gears for different metric thread pitches.
If you have a 3 mm leadscrew, this chart may be of help...

http://bbs.homeshopmachinist.net/thread ... ost1258773
by mklotz
Sun Aug 25, 2019 9:08 am
Forum: General Discussion
Topic: Looking to build a dividing head
Replies: 6
Views: 2772

Re: Looking to build a dividing head

The hole circles you need on the plates are a function of the dividing head's internal gear ratio. When I wrote the programs available under the DIVHEAD archive on my webpage, I included a program, DPLATES, which can be used to determine which hole circles are required to perform all divisions up to...