81X Chains and Attachments
3939 Chains (8" Pitch 81X)
3939 chain is an 8 inch pitch version of 81X and is sometimes referred to as 8081X Chain. The spacing of the G-2 or G-4
attachment holes depends on the Original Equipment Manufacturer (OEM).
GK-2
GK-4
3939 G-2 Attachment Speci cations
Chain Dime nsions Are Give n In Inche s
Chain
Numbe r
Chain
Pitch
P
Inside
Width
W
Rolle r
Pin
Rolle r Plate Pin Plate
Diame te r Diame te r Thickne ss Thickne ss
R
D
Tr
Tp
Link Plate
He ight
H
Riv. Pin
Le ngth
Lr
G-2
G-2
Cot. Pin Attachme nt Attachme nt
Le ngth
Pitch
Hole Dia.
Lc
p
d
1.50
3939 G-2
8
1.062
0.906
0.906
0.437
0.156
0.156
1.125
0.945
1.125
3.00
3.63
0.283
4.00
3939 G-4 Attachment Speci cations
3939 G-4 Attachment Speciļ¬cations
Chain Dime nsions Are Give n In Inche s
Chain
Numbe r
Chain
Pitch
P
Inside
Width
W
Rolle r
Pin
Rolle r Plate Pin Plate
Diame te r Diame te r Thickne ss Thickne ss
R
D
Tr
Tp
Link Plate
He ight
H
Riv. Pin
Le ngth
Lr
G-4
G-4
G -4
Cot. Pin Attachme nt Attachme nt Attachme nt
Pitch
Pitch
Hole Dia.
Le ngth
p1
p2
d
Lc
3.000
3939 G-4
8
1.062
0.906
0.437
0.156
0.156
1.125
0.945
1.125
1.50
3.625
0.283
4.000
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