20mm

The 20 mm caliber is a common firearm bore diameter, typically used to distinguish smaller-caliber weapons, commonly called "guns", from larger-caliber "cannons" (e.g. machine gun vs. autocannon). All 20 mm cartridges have an outside projectile (bullet) diameter and barrel bore diameter of 0.787 inches (20.0 mm). These projectiles are typically 75 to 127 mm (3–5 in) long, cartridge cases are typically 75 to 152 mm (3–6 in) long, and most are shells, with an explosive payload and detonating fuze.
Weapons using this caliber range from anti-materiel rifles and anti-tank rifles to aircraft autocannons and anti-aircraft guns.

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  1. C

    Removing 20mm thick marble over UFH.

    Hi. I need to remove a couple of 400x400x20mm marble over loose wire UFH taped down onto 6mm hardibacker. The hardibacker is fixed down onto chipboard. The wire hasn't been covered with SLC and the tiles have been down for nearly 2 weeks. Any help would be appreciated as I'm not looking forward...
  2. F

    20mm thick limestone

    Picked up this job last night, starting tueday. I've done limestone before, but not this thick. In a kitchen on the floor. Floor boards that I'm over laying with 15mm ply screwed etc. I'm going to use a 12mm trowel, but would it be an idea to back-butter the limestone as well? Ta
  3. P

    10mm sq or 20mm crescent?

    Which trowel will leave a higher adhesive bed between a 10mm sq notched and a 20mm half crescent?
  4. M

    20mm arbor angle grinder

    Anybody come across an angle grinder that has a 20mm arbor as opposed to the usual 22mm one? I came across some diamond blades when I was in East Asia that are 105mm with a 20mm centre - I just wonder what they're used in.
  5. R

    20mm Notched

    Was chatting to a supervisor at work the other he's also a tiler,was talking about slc and he told me he never uses it just uses a 20mm trowel instead anyone else use one of these.Personally i like a flat smooth surface to work on.
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