This range of Grinding wheels from Kinik comes in a range of materials and sizes. Most bench grinders arrive prefited with grey carborundum wheels, it is strongly recommended that you replace at least one of these with a higher quality stone for sharpening and general grinding.
White stones are suitable for most tool sharpening and are the one most likely to suit your needs, the White wheels have low heating properties
Pink wheels are slightly harder than the white they can be considered as largely interchangeable although the pink is suitable if you also want to sharpen drill bits Green Silicon Cabide wheels are the hardest, suitable for sharpening of hard steels but also for drill bit sharpening and for sharpening carbide tipped tools commonly used in turning and if you intend to do this get this wheel as it will do everything, all be it it is slightly less suitable for chisel sharpening as it generates more heat and abrades slower.
Machine fitment guide ( please check before ordering as mistakes may have crept into this list)
Most 16mm machines will take a 20mm wide stone, changing up will add 3mm to the outside of the wheel so if the gap to the guard 4mm wider it's worth considering.
AC150BG 150mm by 20mm by 1/2"
AC200BG 200mm by 25mm by 1/2"
Bosch GBG 8 Professional, GBG 60-20 Professional 200mm by 25mm by 1 1/4"
Charnwood BG200 8" 200mm by 25mm by 5/8"
150mm Bench Grinder 150mm by 20mm by 1/2"
200mm Heavy Duty 200mm by 25mm by 5/8"
Einhell TH-BG 150 150mm by 16mm 1/2""
Energer ENBS19GRB 150mm by 16mm by 1/2"
ENBS520GRB 150mm by 20mm by 1/2"
Guild ( Argos) 150mm by 16mm by 1/2"
JET JBG-6A/JBG-6B 6" 150mm by 20mm by 1/2"
JBG-8A/JBG-8B , JBGM-8 - 200mm by 25mm by 5/8"
Mac Allister MBGP150B 150mm by 16mm 7/8" bore
Makita GB602 150mm by 16mm by 1/2" ( this machine should accept 20mm wheels)
DS200 200mm by 25mm by 1 1/4"
DS150 - 150mm by 20mm by 3/4"
Parkside double wheel and wheel and belt generally 150mm by 20mm by 12mm
BG200 200mm by 20mm by 5/8"
BG200W 150mm by 20mm by 1/2" ( dry wheel)
BG150 150mm by 25mm by 1/2"
BGS700 150mm by 20mm by 1/2"
Silverline 150W 150mm by 16mm by 1/2"
Silverstorm 263524 150mm by 20 by 1/2"
SIP 07546, SIP 07625- 150mm by 20mm by 1/2"
SIP 07628 - 150mm by 25mm by 5/8"
SIP 07557 = 200mm by 20mm by 5/8"
Titan TTB521GRB 200mm by 20mm by 5/8"
Warco 6" Bench Grinder 150mm by 20mm by 1/2"
Warco Heavy duty 6" 150mm by 25mm by 1 1/4" ( no bush required)
Wen 4276 150mm by 20mm by1/2"
Still to buy a Bench Grinder, I recommend kendal tools