ABRASIVE WHEELS 
TYPE 27 DEPRESSED CENTER GRINDING WHEELS 
BY 
Virgin aluminum oxide grain assures 
• 
consistent high stock removal for tough 
applications. 
All sizes are made with uniform grain 
• 
throughout, no filler grain used in the backing. 
All wheels internally reinforced with the highest 
• 
quality fiberglass for maximum safety. 
Super-Lock
™
 Hub on all 5/8-11 threaded
 
• 
wheels is the safest, vibration-free design. 
A24N 
Aluminum oxide grain. 
» 
Soft bond for fast stock removal. 
» 
For applications on ferrous metals 
» 
(steel, iron, welds, etc.) and low grade 
stainless steel. 
A24R 
» 
Aluminum oxide grain. 
» 
Our most popular wheel. 
» 
For general purpose grinding. 
» 
Longer life for fewer wheel changes. 
» 
For applications on ferrous metals (iron, 
steel, welds, etc.) 
Size 
Part # 
A 
B 
C 
Max 
Hub or 
Dia 
Width 
Bore 
RPM 
No Hub 
A24N 
A24R 
Qty 
4 
1/4 
5/8 
13,500 
No Hub 
— 
1 
4-1/2 
3/16 
7/8 
13,300 
No Hub 
— 
1 
4-1/2 
1/4 
7/8 
13,300 
No Hub 
1 
4-1/2 
1/4 
5/8-11 
13,300 
Hub 
1 
13 
5 
1/4 
7/8 
12,200 
No Hub 
— 
1 
6 
1/4 
7/8 
10,200 
No Hub 
— 
1 
7 
1/4 
7/8 
8,500 
No Hub 
— 
1 
7 
1/4 
5/8-11 
8,500 
Hub 
— 
1 
9 
1/4 
7/8 
6,600 
No Hub 
— 
1 
9 
1/4 
5/8-11 
6,600 
Hub 
— 
1 
13-3 
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