Mineral Glass (Rough Edge) Convex Clock Glasses

Convex clock glasses are in traditional imperial sizing and a 1/16th plus or minus allowance must be allowed when ordering.

For how to cut holes in glass easily, please see the video link above.

Doming Heights:

• For all non sternkreuz (MMG) convex glasses allowances must be made as due to the manufacture process, doming is inconsistent

MMG Interior Doming Heights:

• Up to Ø60mm = Doming height 5 - 6mm
• Up to Ø70mm = Doming height 6 - 7mm
• Up to Ø90mm = Doming height 7 - 8mm
• Up to Ø100mm = Doming height 8 - 9mm
• Up to Ø120mm = Doming height 8.5 - 10mm
• Up to Ø140mm = Doming height 10 - 11mm
• Up to Ø160mm = Doming height 11 - 12mm
• Up to Ø170mm = Doming height 12 - 13mm
• Up to Ø180mm = Doming height 13 - 14mm
• Up to Ø190mm = Doming height 13 - 15mm
• Up to Ø200mm = Doming height 15 - 16mm
• Up to Ø210mm = Doming height 16 - 17mm
• Up to Ø220mm = Doming height 18 - 19mm
• Up to Ø240mm = Doming height 19 - 20mm
• Up to Ø260mm = Doming height 20 - 21mm
• Up to Ø300mm = Doming height 22 - 23mm
• Up to Ø330mm = Doming height 24 - 25mm

Barometer Glasses requiring holes need to be drilled using our diamond coated core drills (see items D47369).

• Ideally used with a drill press
• Or a wooden template with a hole the same size to start
• You will need to use water to cool the drill bit
• See You Tube Link: https://www.youtube.com/watch?v=U_NtTBTGp20