What size (3mm shank) ball endmill should buy?

[HankMcSpank]

There's a bloke out in Hong Kong who appears to do reasonable prices on carbide ball end endmills. I've never used a ball endmill & therefore clueless as to which would be the most useful.

Here's what he says...


"we have 1mm, 1.5mm, 2mm, 2.5mm, 3mm ball endmill shank at 3mm. The unit prices (including shipping) are
1.0mm - hkd45.00
1.5mm - hkd48.00
2.0mm - hkd51.00
2.5mm - hkd54.00
3.0mm - hkd57.00"

1 Hong Kong Dollar = approx 8p, therefore....

1.0mm - £5.60
1.5mm - £6.00
2.0mm - £6.37
2.5mm - £6.75
3.0mm - £7.12


Which size is the most useful? (or most 'general purpose')