48 / 105
47
Copyright © 2015 KIC LLC
Brake Drum Numbering System
A.
Overall Diameter
B.
Dust Shield Recess Diameter
C.
Brake Face Diameter
D.
Brake Face Width
E.
Inside Finished Diameter
F.
Hub Pilot Diameter
G.
Bolt Hole Diameter, Number
H.
Diameter to Beginning of Taper
I.
Diameter at Taper
J.
Distance of Face to Taper
BC.
Bolt Circle Diameter
L.
Overall Height
M.
Flange Thickness
N.
Depth of Dust Shield Recess
O.
Squealer Band Thickness
Brake Drum Nomenclature
01 Completely Machined and drilled drum with single drilling operation
04 Identical to 01 except 0.040” undersized
05 Standard drum except 0.10” oversized
06 Standard drum excelpt 0.15” oversized
10 Standard drum with either double drilling or variation of 01 drum
11 Same as 10 with double drilling operation
12 Standard drum with either double drilling or variation of 01 drum
13 Same as 12 except with double drilling operation
14 Same as 10 except 0.040” undersized
5 Counterbored for recessed fastener
6 Counterbored for recessed fastener + Balanced
7 Cast Teeth on Bottom of Drum For Antiskid
8 Machine Balanced to 10 oz. in.
9 Same as 017 except Machine Balanced
X X X X X
XX X
EXAMPLE:
60001-01:
60001 Casting, completely machined and drilled with single drilling operation
60001-018:
Same as 60001-01 except machine balanced to 10 oz. in.
5XXXX Standard Drum Casting
(Grade 3500b)
6XXXX Special Metallurgy
(Grade 3000b)
7XXXX Rotor PN
8XXXX Lightweight composite