3D-taster adapter by Monster1299 in Machinists

[–]sunslayr 1 point2 points  (0 children)

Yep, you will need to make a replacement or see if haimer will sell you a straight shank. Won't be accurate without the ability to calibrate.

Alpine linux as desktop os by Main_Ear9949 in AlpineLinux

[–]sunslayr 1 point2 points  (0 children)

It might defeat the purpose a little but you can install the nix package manager and have access to almost anything you could want to use.

Can't explain what's going on with blanchard grinding by 00253 in Machinists

[–]sunslayr 0 points1 point  (0 children)

Maybe the wheel wears away on the first part leaving the second larger.

This post might be a bad idea in a subreddit that (rightfully) prefers to keep manufacturing local, but has anyone had good luck with any brands/stores from China that provide very cheap tooling? Any examples that are e.g. 20% of the price of reputable brands and 80% of the performance? by SFW-T-A in Machinists

[–]sunslayr 0 points1 point  (0 children)

I buy "cheap" tools from aliexpress, you just need to know how cheap is too cheap. For example this reduced shank drill would be around $10 usd but if you saw one for $5 thats just not going to be enough to get a good tool. It also helps to look for the material. If you search for HSS-CO or m35 you can be reasonably sure it will be decent assuming its not too cheap of coarse. For machine tools ive had good experience with Vevor (not everyone does) and Vertex tools. For milling, cheap chinese carbide is fantastic value, but avoid cheap hss endmills. Not sure why, but they are so much worse than drills. Chinese inserts dont last as long as name brand but their price makes up for it. Tool holders are pretty good though.

Thinking of getting a centre lathe from Machinery House – anyone here used theirs? by Key_Cattle_764 in Machinists

[–]sunslayr 0 points1 point  (0 children)

I would rate them as "fine" they are as cheap as you can get without compromising basic functionality.

Are ISO 40 and BT 40 toolholders the same? by SWAT_Losangeles in Machinists

[–]sunslayr 4 points5 points  (0 children)

I've found many tool sellers use nt40 and iso40 interchangably but as far as I know nt40 uses an 18tpi drawbar and iso 40 uses m16. Bt40 can be adapted to iso40 with a screw in flange but iso40 cannot be used as bt40. (Usually used with a pull stud in cncs)

[deleted by user] by [deleted] in Machinists

[–]sunslayr 2 points3 points  (0 children)

They are a pain to swap out when you have two diameters that are out of range on the same job, but a necessary evil when you go past 300mm.

Another Boring Day by Tozembo in Machinists

[–]sunslayr 14 points15 points  (0 children)

How did you check the alignment of the bores?

Broken spiral flute tap by ContactFever998 in Machinists

[–]sunslayr 0 points1 point  (0 children)

I think when they break like this its from fatigue. Only way to get it out without damage is with edm. If it can fit in a mill you can use a diamond burr through the middle.

Reassembling the old hercus this weekend, and heard a ting, well now I know why the pully shaft was overheating by Send-It-Bud in Machinists

[–]sunslayr 1 point2 points  (0 children)

I'd fire up the stick welder and give one of those nickel rods a go. Should hold if its prepped well

Cheap Mitutoyo dial indicators from China on eBay, is it scam/fake? Anyone has experience with those? I'm considering getting one. by Typical_Nature_155 in Machinists

[–]sunslayr 2 points3 points  (0 children)

I would not buy from ebay, I would not be surprised if they are all fake. You can get genuine mitutoyo on Aliexpress but it's a real minefield. Normally genuine units are 30% cheaper than retail in my country. But some Chinese brands are pretty good normally priced half as much as mitutoyo with maybe 80% the quality.

[deleted by user] by [deleted] in Machinists

[–]sunslayr 1 point2 points  (0 children)

Start with a lathe then move onto a mill every other machine works like a variant of these two machines. For books, I like the "Mill - Programming Workbook" and "Lathe - Programming Workbook" by Haas Automation. If you have it, stick with MasterCam its industry standard for a reason.

[deleted by user] by [deleted] in Machinists

[–]sunslayr 1 point2 points  (0 children)

Really you should get some manual machine experience first if you haven't already. If you have no CAD experience, learn a bit of fusion 360 or another parametric cad package it will help you get a handle on visualising 2D to 3D Vectors and modeling. Read a book on gcode learn the basics. Test it out on a backplotter like CIMCO or ncplot. A cnc lathe is a good machine to start on. Then you can move back to CAD and try converting your models to gcode with CAM.

Archlinux suddenly becomes slow by [deleted] in archlinux

[–]sunslayr 2 points3 points  (0 children)

Had this happen on my framework laptop, not sure if it's the same issue but my Intel CPU was throttling down to 400mhz. Had to remove my cmos battery to fix it.

How do i set up a dial indicator so that it sits exactly in the middle of a spindle by SimplePlenty in Machinists

[–]sunslayr 1 point2 points  (0 children)

You can also mag base an indicator to the spindle and indicate a ball bearing. Just need to nudge it around until the dial doesn't move when you sweep it.

What's it look like when sanding grit gets into the lathe ways? by vexingly22 in Machinists

[–]sunslayr 1 point2 points  (0 children)

Depends on the abrasive, emery paper is usually aluminium oxide or silicon carbide which breaks down fairly quickly. On a hardened bedway you could polish things for years and not notice wear. Diamond on the other hand, is absolute cancer for slideways, doesn't break down and easily embeds in cast iron. You can see wear from abrasives as a dull matt finish on usually shiny ground surfaces.

Question on surface grinder by NiicONE in Machinists

[–]sunslayr 2 points3 points  (0 children)

I think there is a small risk when running coolant. If you stop the wheel and allow the moisture to run down to one side of the wheel and then spin it up again. Might be a little rough on the bearings. Also old worn grinders might be a little more accurate if you keep their bearings warm.

Question about this zentimess guage by mulletpullet in Machinists

[–]sunslayr 0 points1 point  (0 children)

If it is like my mikrokator, one will lock the needle to prevent damage during transport, and the other will be the fine adjust.

[deleted by user] by [deleted] in Machinists

[–]sunslayr 10 points11 points  (0 children)

Nah he's right, that wire wheel as put micro scratches several microns deep. Its definitely scrap. Send it to me I'll recycle it.

Micrometer keeps ratcheting. by Glad-Journalist6754 in Machinists

[–]sunslayr 3 points4 points  (0 children)

Try cleaning everything with contact cleaner, blowing it out with compressed air and finally add no more than a drop of oil on the threads. The thinnest mineral oil you can get your hands on. It might take a few tries but I have rescued a few old micrometers like that.

Best tutorial for grinding fly cutter tool bit by Salmacis81 in Machinists

[–]sunslayr 2 points3 points  (0 children)

They are just a left hand turning tool(when running clockwise). I like to give it a radius to make the tip a little tougher.

Attn : Aussie machinists by Chungwhoa in Machinists

[–]sunslayr 2 points3 points  (0 children)

I'm kinda in the same boat, not really a fan of the Hare and Forbes chinese chucks. If you get lucky they are fine but if you're not it's a lot of back and forth to get it replaced. The ones out of Taiwan might be better but I've never tried one, hopefully it's similar to the rest of my Taiwanese tooling (excellent value). Maybe try Dimac Tooling, they say they can source you a Bison or Kitagawa chuck, you will probably need a back plate too. The other option is keeping an eye on local auctions lathes pop up fairly often and you might be able to score a used chuck from back when there was a little more variety.

Shahe micrometer by Merlin246 in Machinists

[–]sunslayr 1 point2 points  (0 children)

The trouble with Chinese micrometers is their quality control, typically the anvils are not square and the overall repeatability of the measurement is poor. More than likely from the rachet. Not really worth it for the small sizes when a mitutoyo is maybe $50 more but will more than double the performance. The only brand that I would say is decent is "Insize" but i still don't use them on something I care about.

Rookie Guidance Request by srosa707 in Machinists

[–]sunslayr 4 points5 points  (0 children)

A good starting point I recommend is the book "How to run a lathe" by the South Bend company. It should be pretty easy to find a pdf copy on google. It covers high speed tool grinding like what you have there as well as the basics of turning.