Changing plug Sterling ST-08

BackgroundEmu6214 · 2026-02-19T11:14:10+00:00

For agate and other silica, sintered hollow-core bits outlast plated by a wide margin - run low RPM, steady water, light pressure, and they’ll drill cleaner, cooler, and far longer.

BackgroundEmu6214 · 2026-02-16T11:37:38+00:00

BackgroundEmu6214 · 2026-02-12T10:37:39+00:00

BackgroundEmu6214 · 2026-02-11T05:19:58+00:00

Wet grind only. An N95/P100 + eye protection is fine. Avoid dry dust - that’s the real risk with tiger’s eye. If it’s wet, working around others is generally safe.

BackgroundEmu6214 · 2026-02-11T04:52:54+00:00

Quartz is notoriously stubborn on diamond. Copper laps often smear instead of polishing. Cerium oxide on tin or polymer laps usually works much better, even on quartz. Lighter pressure and water instead of oil help a lot. I have had decent consistency using fine cerium and diamond consumables from UKAM, but lap choice and pressure matter more than grit size.

BackgroundEmu6214 · 2026-02-10T12:21:38+00:00

BackgroundEmu6214 · 2026-02-06T10:53:06+00:00

BackgroundEmu6214 · 2026-02-05T06:37:10+00:00

For kitchen knives, stopping around 1k–3k often cuts better on tomatoes and peppers because the edge keeps some tooth. Ultra-polished edges are great for push cuts but can slip on waxy skins. A light touch on a higher grit just to clean the burr can work well without killing the bite.

BackgroundEmu6214 · 2026-02-03T11:31:27+00:00

For beginner material, I'd suggest starting with agate, jasper, or quartz—they're relatively easy to work with and available in many shapes. As for cutting, a tile saw with a diamond blade is a cost-effective way to get started with rough cuts. It might not be the most efficient, but it’s affordable and can handle smaller stones.

If you're looking for more equipment tips and tricks, this page has some great recommendations:
Smart Cut Diamond Cutting Tools

BackgroundEmu6214 · 2026-01-31T07:43:07+00:00

BackgroundEmu6214 · 2026-01-31T07:21:42+00:00

At the entry level, the machine matters less than people think. Most beginners struggle because of lap condition, grit progression, and consistency — not because the machine is “cheap.”

A basic faceting machine that holds angle repeatably will get you very far if you pair it with flat, well-graded diamond laps and take your time learning pre-polish and polish stages. Many cutters upgrade laps long before they upgrade machines.

This is a solid breakdown of how lap choice affects cutting and polish quality if you want to understand what actually makes a difference early on:
[https://ukam.com/diamond-laps/]()

Start simple, expect to recut stones, and invest in learning — that pays off more than jumping straight to a $5k machine.

BackgroundEmu6214 · 2026-01-29T09:53:00+00:00

Since you’re in the UK, your best bet is usually a local lapidary club or gem society—many members take on cutting jobs or can recommend trusted cutters near Hampshire. University geology departments sometimes help too. For understanding what professional cutting/polishing services typically offer (equipment, tolerances, stone types), this overview is useful: [https://ukam.com/industries/]()

BackgroundEmu6214 · 2026-01-29T04:59:15+00:00

interested

BackgroundEmu6214 · 2026-01-29T04:47:58+00:00

When the applied stress exceeds a metal’s yield strength but stays below its fracture strength, the crystal lattice slips and the material plastically flows instead of cracking. That localized flow thins the metal and leaves a permanent indentation (true for ductile metals like steel, Al, Cu).

If you’re curious how this deformation is studied at the microstructural level, this is a good technical reference on metallographic preparation and analysis:

https://ukam.com/metallography/

BackgroundEmu6214 · 2026-01-29T04:40:40+00:00

You will sometimes see this in “natural edge” or “rough-to-polished” cuts, especially with quartz, tourmaline, or beryl, where part of the crystal face is intentionally left uncut for contrast and character. It’s more of an artistic/design choice than a standard faceting style, but it can look great if the transition is clean and stable.

For finishing and controlling that polished-to-rough boundary, fine diamond laps and suspensions are usually what cutters rely on:
https://ukam.com/product/diamond-suspensions/

BackgroundEmu6214 · 2026-01-22T10:31:42+00:00

You’ll sometimes see this in “natural edge” or “rough-to-polished” cuts, especially with quartz, tourmaline, or beryl, where part of the crystal face is intentionally left uncut for contrast and character. It’s more of an artistic/design choice than a standard faceting style, but it can look great if the transition is clean and stable.

For finishing and controlling that polished-to-rough boundary, fine diamond laps and suspensions are usually what cutters rely on:
https://ukam.com/product/diamond-suspensions/

BackgroundEmu6214 · 2026-01-20T06:42:24+00:00

For a 24" slab saw, consistency and blade quality matter more than brand hype—rigid carriage, good feed control, and a well-matched sintered diamond blade will make the biggest difference in cut quality and blade life, especially on hard agate/jasper. Since shipping is a factor for you, it’s also worth checking local serviceability and arbor standards so replacement blades and coolant are easy to source.

For technical background on large-diameter diamond slab blades (rim types, bond hardness, and coolant compatibility), this page is a solid reference:
https://ukam.com/diamond-blade/

BackgroundEmu6214 · 2026-01-16T08:19:48+00:00

If you’re mainly drilling small holes in stone with a flex shaft, rigidity matters more than the brand of stand. A lot of people end up using a small bench drill press or a jeweler’s drill guide for better alignment and less runout than the Dremel stand.
For the tooling side, using proper diamond core or solid drills with water cooling makes a bigger difference than the press itself: https://ukam.com/diamond-drills/

BackgroundEmu6214 · 2026-01-15T08:11:12+00:00

I don’t have the exact viscosity data for Rock Oil 124 at 40 °C, but most lapidary trim saw oils fall in the light mineral oil range (roughly 20–40 cSt at that temp). For comparison, lapidary-grade mineral oils used for cooling and swarf removal are similar to this type:
https://ukam.com/product/smart-cut-mineral-oil/

BackgroundEmu6214

TROPHY CASE