3939 series lumber conveyor chain
The 3939 chain is an extended pitch (8″) version of the 81X chain. These chains are specifically designed for drop sorting applications, where lumber is sorted using a J-hook attachment. Our unique selection of 3939 chains includes the 3939, 3939-4 (3939-B4), and 3939H models. What distinguishes our extended pitch j-bar sorting chains is our use of precision components, superior raw materials, and solid round parts (bushings and rollers).
This results in a high-performance chain with exceptional strength and durability, ideal for demanding sorting applications. In addition to the chains, we also offer 3939 chain sprockets in various configurations, including drive, idler, solid, split, and more!
Diameter Data
| Chain
No. |
Pitch
P mm |
Inner Width of
Inner Link b1(min) mm |
Diameter of
Roller d1(max) mm |
Diameter of Pin
d1(max) mm |
Length of Pin
L(max) mm |
Height of
Sidebar h2(max) mm |
Thickness of
Sidebar T mm |
J
mm |
K
mm |
N
mm |
M
mm |
Tensile Strength
Q(min) KN |
| 3939 | 38.1 | / | / | 6.35 | ||||||||
| D3939-B4 | 38.1 | 101.6 | 7.14 | 7.14 | ||||||||
| D3939-B21 | 38.1 | / | / | 7.14 | ||||||||
| D3939-B23 | 203.2 | 23.02 | 26.99 | 11.1 | 49.0 | 28.6 | 4 | / | 92.1 | 10.30 | / | 115.58 |
| D3939-B43 | 38.1 | 92.1 | 10.30 | 7.14 | ||||||||
| D3939-B24 | / | 101.6 | 7.14 | / | ||||||||
| D3939-B40 | / | 101.6 | 10.30 | / | ||||||||
| D3939-B44 | 38.1 | 101.6 | 10.60 | 7.14 |
For more information or to request a quote for our high-quality 3939 chains, please contact our customer service team, and we will be happy to assist you!
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