Large size conveyor chain

Large size conveyor chains are chains with a wide operational range: they can transport in any direction in any combination freely - horizontal, vertical, inclined, etc., do not require special materials for temperatures up to about 200°C, use heat-resistant steel for higher temperatures, and have corrosion and chemical resistant specifications against water and chemicals.
It can carry almost any materials, from powders such as pulverized coal and cement to granular products such as wheat and soybeans, lumps such as ores and rocks, and products weighing several tones each, with few restrictions on what can be transported.

Construction

Large size conveyor chain structure diagram

New launch in October 2023

Screw Lock Link

Screw Lock Link

Connecting link for safe and quick operation.

Note) The pin length is longer due to the nut method. Please make sure that there is no interference with the device.

※Total length tolerance for large size conveyor chain is +0.25%.

■Slip fit

When the shafts (pins and bushes) and holes are fitted together, there is always a loose fit.

This is a fit where the range of hole tolerance is larger than the range of shaft (pin or bushing) tolerance.

■Press fit

When the shafts (pins and bushes) and holes are fitted together, there is always an interference fit.

This is a fit where the range of hole tolerance is smaller than the range of shaft (pin or bush) tolerance.

See more about components and their roles

※( ) denotes codes for part names as found on drawings.
1.Pin (CP) 2.Bush (B)
The most important role of the pin is connecting the inner link to the outer link. Along with the plate, it receives chain tension along the direction of travel while receiving vertical reactive forces from the conveyed items. The outer diameter of the pin suffers wear from sliding against the bush inner diameter when the chain articulates. The pin is an essential strength bearing part and requires high wear resistance. The bush is a strength bearing part, receiving tension from the chain during sprocket engagement, but its main role is as a bearing part. The outer diameter of the bush suffers wear from sliding against the roller inner diameter during roller rotation, while the bush inner diameter suffers wear from sliding against the outer diameter of the pin when the chain articulates. Bush inner diameter wear is directly expressible as pitch elongation.
3.Roller (R-R, F-R, S-R, M-R, N-R) 4.Plate (PLP-A, PLP-B, BLP)
Forms a slip fit with the bush. Rotates when engaging with the sprocket, while alleviating the shock and wear from the teeth. Rotation also lowers running resistance. The plate mainly receives the tensile load along the chain's direction of travel while receiving vertical reactive forces while supporting the conveyed item. The outer plate and inner plate slide against each other during chain articulation, as well as against the sides of the sprocket teeth during sprocket engagement. Outer plate holes are either round or flat.
5.T-pin (T-PIN) 6.Attachments
Parts photo After the outer plate is press-fitted to the pin, A T-pin is inserted and bent to prevent the pin from falling out.Bend 30º or more, or so that the end of the T-pin does not exceed the height of the plate. For attaching items to the chain.
See "Attachment types" below for the types of attachments.

■Basic 3 dimensions of chain

The pitch, roller diameter, and inner width of the inner link are considered the basic three dimensions of a roller chain. When these dimensions are identical, a roller chain and sprocket are dimensionally compatible.

See more about attachment types

Attachments are parts for attaching conveying jigs to chains. They can be assembled at any desired spacing.

Standard attachment

Standard attachments are both economical and versatile.

A attachments

A attachments are bent on one side of the chain.

They are referred to as A1, A2, or A3, depending on the number of bolt holes.

A1 attachment

A1 attachment

A2 attachment

A2 attachment

A3 attachment

A3 attachment

K attachments

K attachments are bent on both sides of the chain.

They are referred to as K1, K2, or K3, depending on the number of bolt holes.

K1 attachment

K1 attachment

K2 attachment

K2 attachment

K3 attachment

K3 attachment

GA attachment

GA attachments have a hole in the link plates on one side.

Referred to as GA2 or GA4, depending on the number of bolts holes.

GA2 attachment

GA2 attachment

GA4 attachment

GA4 attachment

Special attachments

Special attachments for various applications.

Deep link

Deep link

Top roller

Top roller

Outboard roller

Outboard roller

Flow

Flow

Integrated Attachment Chain

Wide variety of Integrated Attachments.

SA attachments

SA attachments

Straight attachment on one side

SK attachments

SK attachments

Straight attachments on both sides

CA2 attachments

CA2 attachments

Used to attach a net or slat with no spacing

AA3 attachments

AA3 attachments

Strong type, attachment fits between the plates.

AR2 attachments

AR2 attachments

A attachment with increased flexural rigidity
(w/reinforcing ribs )

MG2 attachments

MG2 attachments

Allows for one mounted jig to be used

AS2 attachments

AS2 attachments

For scrapers or flights

AF2 attachments

AF2 attachments

For deep scrapers or flights

WSA0 attachments

WSA0 attachments

Prevents conveyed items from spilling

With extended pins

With extended pins

Objects can be attached to the pin end
(Model : EN)

Stay Pin

Stay Pin

Item can be directly laid on stay pin, or mesh, etc. can be attached
(Model : TN)

Top plates

Top plates

Prevents damage to conveyed items
(Model : TP)

Trolley rollers

Trolley rollers

Used in long distance, horizontal applications
(Model : TRO)

Outboard rollers

Outboard rollers

Provides support for heavy loads
(Model : RO)

Guide shoes

Guide shoes

Prevents lateral movement
(Model : GS)

Guide Roller

Guide Roller

Used in horizontal applications
(Model : GR)

Fixed dogs

Fixed dogs

Conveys by pushing
(Model : KD)

Dog rollers

Dog rollers

Conveys round items by pushing
(Model : RD)

Tilting dogs

Tilting dogs

Can accumulate items on top of the conveyor
(Model : CD)

Roller tilting dogs

Roller tilting dogs

Can accumulate round items
(Model : RCD)

Ducking dogs

Ducking dogs

Conveyed item will remain in fixed position
(Model : DD)

Roller types

Large size conveyor chains come with three basic roller types, depending on the application.

Basic Roller Types for Large Size Conveyor Chain
R-roller F-roller S,M,N-roller
R-roller F-roller S,M,N-roller
  • ・Our most basic, versatile roller type.
  • ・Features a high roller allowable load and low frictional resistance.
  • ・Can easily stop lateral motion.
  • ・Perfect for rough operating conditions, standard slat conveyors, etc.
  • ※When using K attachments, be aware that attachment area may contact roller flange.

Works to alleviate shock and wear when engaging the sprocket.

  • ・S-roller :
    Roller diameter is smaller than plate height.
  • ・M-roller type :
    Roller diameter is slightly larger than that of S rollers.
  • ・N-roller type :
    Roller diameter is same as M rollers, but pins are thicker for better strength. (RF26200N or higher)

See more about roller guide methods

The following are examples of methods for guiding rollers on the drive and return sides for smooth large size conveyor chain operation.

Guide Methods

R roller (S roller) chains F-roller chain Outboard Roller Chains
Drive side
Return Way

Safety precautions

Never weld additional parts onto an assembled chain. Doing so may cause chain kinking or twisting due to plate deformation, further reducing part hardness and leading to embrittlement fracture from the welding heat.

Large size conveyor chain

General-use, Heavy Duty Conveyor Chain

Basic model for general use and Advanced model with improved performance are available.

DT series for general use type and DTA series with improved wear resistance, AT series with improved maximum allowable load and high grade ATA series, CT series with better pin-bush wear resistance and BT series with approximately twice the maximum allowable load, allow you to select the most suitable conveyor chain for the required capacity.

Tsubaki offers metric and imperial pitches with a wide array of attachments.

Large size conveyor chain  DT Series

Model No.  RF□□□□□R・F・S・M・N-DT~

View product details

Our most economical general use conveyor chain. (Basic model )

  • ・Available in meter and inch pitches.
  • ・A wide array of attachments.
  • ・Pins and bushes are heat treated, but plates are not.
  • ・Operating Ambient Temperature :-20℃~200℃
Size

RF03tons~RF120tons
RF430~RF212

Attachment Types

A1, A2, A3, K1, K2, K3, GA2, GA4 etc.

Roller type

R-roller , F-roller ,
S-roller , M-roller

Large size conveyor chain  DTA Series

Model No.  RF□□□□□R・F-DTA~

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Advanced version of DT Series that offers better wear resistance (Advanced model )

  • ・Has 3x bush-roller wear resistance of DT Series.
  • ・DTA Series chains are available with R and F rollers only.
  • ・Operating Ambient Temperature :-20℃~200℃
Size

RF03tons~RF36tons
Contact us for imperial pitches.

Attachment Types

A1, A2, A3, K1, K2, K3, GA2, GA4 etc.

Roller type

R-roller , F-roller

Large size conveyor chain  AT Series

Model No.  RF□□□□□R・F・S・M・N-AT~

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Has twice a maximum allowable load of general use conveyor chain (DT Series), with increased bush - roller wear resistance and roller allowable load. (Basic model )

  • ・Available in meter and inch pitches.
  • ・A wide array of attachments.
  • ・Operating Ambient Temperature :-20℃*~400℃
    ※Contact a Tsubaki representative when using below -20℃.
Size

RF03tons~RF440tons
RF430~RF212

Attachment Types

A1, A2, A3, K1, K2, K3, GA2, GA4 etc.

Roller type

R-roller , F-roller ,
S-roller , M-roller ,
N-roller

Large size conveyor chain  ATA Series

Model No.  RF□□□□□R・F-ATA~

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Higher model of AT series. Improved wear resistance and maximum allowable load. (Advanced model )

  • ・Has 2x bush-roller wear resistance & 1.5x pin-bush wear resistance of AT Series, along with 1.2x maximum allowable load.
  • ・ATA Series chains are available with R and F rollers from RF08-RF36 size only.
  • ・Operating Ambient Temperature :-20℃*~200℃
    ※Contact a Tsubaki representative when using below -20℃.
Size

RF08tons~RF36tons
Contact us for imperial pitches.

Attachment Types

A1, A2, A3, K1, K2, K3, GA2, GA4 etc.

Roller type

R-roller , F-roller

Large size conveyor chain  CT Series

Model No.  RF□□□□□R・F・S・M・N-CT~

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Better pin-bush wear resistance than DT Series. (Function-specific product )

  • ・Improved pin-bush wear resistance of DT Series general use large size conveyor chain.
  • ・Operating Ambient Temperature :-20℃*~200℃
  • ※Contact a Tsubaki representative when using below -20℃.
Size

RF03tons~RF120tons
RF430~RF212

Attachment Types

A1, A2, A3, K1, K2, K3, GA2, GA4 etc.

Roller type

R-roller , F-roller ,
S-roller , M-roller

Large size conveyor chain  BT Series

Model No.  RF□□□□□R・F・S・M・N-BT~

View product details

Twice max. allowable load of CT Series (Function-specific product )

  • ・Improved (about twice) maximum allowable load of CT Series large size conveyor chain.
  • ・Operating Ambient Temperature :-20℃*~200℃
  • ※Contact a Tsubaki representative when using below -20℃.
Size

RF03tons~RF120tons
RF430~RF212

Attachment Types

A1, A2, A3, K1, K2, K3, GA2, GA4 etc.

Roller type

R-roller , F-roller ,
S-roller , M-roller