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

Inner Width of

Inner Link b1(min) mm

Diameter of

Roller

d1(max)

Diameter of Pin

d1(max)

Length of Pin

L(max)

Height of

Sidebar

h2(max)

Thickness of

Sidebar

Tensile Strength

Q(min)

3939

38.1

6.35

D3939-B4

38.1

101.6

7.14

D3939-B21

38.1

7.14

D3939-B23

203.2

23.02

26.99

11.1

49.0

28.6

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!

How to choose power transmissions parts and industrial products which meet our requirement

Chains	Sprockets	Pulleys	Timing belt Pulley	V-belt Pulley
Sheaves	Coupings	Bush &Hub	Gear& Rack	V-Belt
Locking Assembly	Pulley	Gearbox	Reducer	Shaft Collar
Rod End Bearing	Clevis	PTO	Chain Guide	Belt Guide
Rubber Buffer	Chain Tensioner	PTO Drive Shafts	Universal Joints	Roller Chains
Conveyor Chains	V-Belts	Worm Gearbox	Helical Gear	Worm
Agricultural Chain	CNC Proces Parts	Casting	Stamping
Powder Metallurgy	CNC Proces Parts	Casting	Stamping

What Products Do you sell ?

We are a group of factories, give customer one stop solution of power transmission and industrial products. We are in the position to supply wide range of products, including chains, sprockets, v-belt and v-belt pulleys, timing belt and timing belt pulleys, gears, speed reducers, motors, racks, couplings, and many other parts, like locking assembly, taper bushing, Chain guide, shaft collar, torque limiter, cam clutch, universal joint, motor base and motor slide, rod end, clevis, rubber mount, etc. We make special parts according to drawings and/or samples.

How to choose a gearbox which meets our requirement?
You can refer to our catalogue to choose the gearbox or we can help to choose when you provide
the technical information of required output torque, output speed and motor parameter etc.

What information shall we give before placing a purchase order?
a) Type of the gearbox, ratio, input and output type, input flange, mounting position, and motor informationetc.
b) Housing color.
c) Purchase quantity.
d) Other special requirements.

What industries are your gearboxes being used?
Our gearboxes are widely used in the areas of textile, food processing, beverage, chemical industry,
escalator,automatic storage equipment, metallurgy, tabacco, environmental protection, logistics and etc.

What is the producing process?

Production process including raw material cutting, machine processing, grinding, accessories cleaning, assemble, cleaning, stoving, oil coating, cover pressing, testing, package.

How to control the products quality?

Combining advanced equipment and strict management, we provide high standard and quality bearings for our customers all over the world.

What is the transportation?

-If small quantity , we Suggest to send by express, such as DHL,UPS, TNT FEDEX. If large amount, by air or sea shipping.

Can we design packaging?

-Yes. Default is regular packing, and we can make customer's own packing.

Can you provide OEM service?

-Yes, we work on OEM orders. Which means size, quantity, design, packing solution, etc will depend on your requests; and your logo will be customized on our products.

Can you give me discount on Power Transmissions Parts and Industrial parts?

-Yes, of course. Pls. send me your Email, you'll get more

Q: Are You a trading company or a manufacturer?

A: We Are the factory and have our Own trading company

Q: How Can I get an offer?

A: please send US quotation information: drawings, materials, weight, quantity and requirements, we can accept PDF, ISGS, DWG, STEP file format. If you don't have the drawings, please send us the samples, we can also quote you according to your samples.

Q: What is your minimum order size?

A: it is usually 100 pieces, but a low quantity is acceptable under some special circumstances.

Q: Do you provide samples? Is it free or extra?

A: Yes, we can provide samples free of charge, but we don't pay the freight.

Q: What is the lead time for mass production?

A: honestly, it depends on the number of orders. Normally, if you don't need the tools, deposit them after 30 days or so.

Q: What if the parts don't Work?

A: we can guarantee the quality, but if it happens, please contact us immediately, take some photos, we will check the problem and solve it as soon as possible.

Q: What are your terms of payment?

A: payment is less than US $1000,100% in advance. Payment: $1000,50% wire transfer in advance, balance before shipment,Other Terms of payment are negotiable

3939 series lumber conveyor chain