IBEX HARDWARE CBN & DIAMOND WHEELS
No: 21 Note: made for Carborundum Abrasives by J K Smit & Son
Ref: MD150 R25
Shape: Cup FEPA
Diameter: 8 Arbor: 1.25 plus 4 holes at 90 deg on 3.25 pcd
Width: 19.5 Section
In original boxes (well worn) but with new contents!
Weight 1.5 kg
Postage to Europe £11.95
EXTRACTS FROM INFORMATION FOR J K SMIT GRINDING WHEELS
OF ABRASIVE J K SMIT TYPES ARE CODED
AS FOLLOWS BY A LETTER OR LETTERS PRECEDING THE GRIT SIZE
for Resinoid Wheels
Grit: Metal clad grit. General
purpose for wet and dry applications
Grit: Metal clad grit for grinding of mixed metal areas where
steel/carbide ratio is high. Wet
grit for carbide only. Dry application
but can be used wet
wet and dry applications
CBN grit for JKS Resin wheels. Wet and
for Metal Wheels
General purpose for wet grinding applications
metal-bonded wheels used on glass and ceramics
Grit: CBN grit for metal bonds. Wet applications in steel
Resin bonds can be used wet or dry in
combination with either diamond or CBN grits.
They give the best compromise for stock removal and finish when dry
grinding but coolant will improve all characteristics.
Metal bonds are also used in combination
with either diamond or CBN grits and are more durable and shock resistant than
resin bonds, although generally less free cutting. Copious and well directed coolant is vital to
obviate bond loading, except for the M55 bond.
TYPE AND SELECTION
grinding resin bonds for diamond wheels
grade of B77 A very soft bond for use where freedom-of-cut must be an absolute
maximum. It will cut with minimum heat
generation, but will not hold corners or resist grooving. Shock resistance is low and the bond should
not be used for unsupported sections
grade of B77 A general purpose bond for use where freedom-of-cut must take
precedence over wheel life
grade of B77 A general purpose bond where wheel life is more important than
freedom-of-cut. This bond is very
accommodating in processing and is, therefore, useful for 'difficult' wheel
shapes. Shock resistance and corner
handling are good
grade of B77 A bond of special category.
Provides a crisp grinding action with reasonable life.
grinding resin bonds for diamond wheels
grade of B87 A general purpose bond which has proved its effectiveness over a
number of years. The shock resistance is
excellent , but very alkaline coolants could damage the bond.
grade of B87 The equivalent, for wet grinding of U-B77 above. Used with grits below 107 (150/170 B.S.) in
no more than 50 concentration.
grade of B87 A really long life bond with remarkable grit retention and good
shock resistance. This bond requires an
ample continuous and well directed coolant supply. Where appreciable areas of steel are
contracted, the use of 5%, or even 10%, of a soluble E.P. oil is recommended.
grade of B83 (Super-Finishing Bond)
Generally recommended to be used wet and with grits finer than D46.
grinding metal bonds for diamond wheels
grade of M8 (M8N) General purpose bond suitable for all wheel shapes and for offhand,
cylindrical and surface grinding.
grade of M8 (M8U)
Freer cutting that 'N'
grade. Available in all shapes.
grade of M8 (M8K) Free-cutting grade for face-coated wheels
grade of M8 (M8J) Free-cutting grade for peripheral wheels
grade of M7 (M7W) Electrolytic grinding. surface
and cylindrical grinding where corner holding is important. Available in all
grade of M6 (M6R) For ceramic grinding.
Available in all shapes.
grade of M5 (M5N) For ILI chipbreaker wheels.
grade of M5 (M5L) For optical lens laps.
grade of M3 (M3KP) For electrolytic grinding where mechanical action is minimal.
BBZ For grinding high alumina and tungsten carbide.
As a general rule, wheel performance , endurance,
and the level of surface finish obtained on the part ground is enhanced by the
higher CBN or diamond concentrations.
For roughing and for high rates of stock
removal, the combination of course grit and high concentration is ideal.
Low concentrations with fine grits are
best suited to super-finishing applications.
Concentrations Diamond/CBN per
150 6.6 carats
125 5.5 carats
*100 4.4 carats
*75 3.3 carats
*50 2.2 carats
1 carat = 0.2 metric gramme