Sprocket ・Pin gear drive

A sprocket is a type of gear and is also called a chain wheel.

A mechanical element that can transmit the rotation of a shaft to a chain or the tension of a chain to a shaft.

Types depend on use of a hub: Type A (flat type), Type B (single hub), Type C (dual hub).

High-strength, corrosion-resistant series are available for use in a variety of situations.

※Sprockets for Plastic modular chains, Top chains and Plastic block chains can be found on the product page for each chain.

Features

  • ・When used for drive chain transmission, a large reduction ratio can be achieved by combining the number of teeth. (Usually up to 1:7 )
  • ・Choose from a wide range of lineups, including pilot bore products, finished bores and additional bore finishings. (Steel, stainless steel, engineering plastic, surface treatment, etc. )
  • ・A range of materials and specifications are available to suit your application.
  • ・Sprockets for pin gears with special tooth profiles can be used in combination with attachment chains or pin rack/pin wheel for rotating and linear drive applications instead of power transmission applications.

Construction

RS sprockets are manufactured in four types in conformance with JIS standards.

Model code A Type
(flat plate )
B type
(Single hub )
C type
(Dual hub )
SD Type
(single dual )
Construction A Type B type C type SD Type
Multi-strand Heavy Duty Chain (Super-H, RS-HT, etc.)  Note 1 For using two single-strand chains at the same time
HB type HC type
Usage by structure Used when mounting on a rotating body, such as the center member of Torque Limiter. Most versatile use. For use with large driven sprockets or when key surface pressure is insufficient with B type. For using two single-strand chains at the same time.

Notes
 1.The total tooth width (transverse pitch) of multi-strand Heavy Duty chains (HB/HC types) differs from the standard.

Locking system to shaft

The following three types of bores for attaching the sprocket to a shaft are available for RS sprockets.

Series Appearance Package
Standard pilot bore Structural drawing
  • You will need to further finish the bore when using.
Fit bore  Structural drawing Structural drawing
  • Codes for types of shaft or bearing bore finishing and makes ordering by model number accurately.
  • Lineup of finished bores and additional bore finishings for shaft bore finishing.
  • Shaft bore, keyway and tapped holes have already been machined, so the product can be used as-is right after delivery.
  • Bearing bore finishing is a housing bore finished with high precision, and it can be used immediately after inserting the bearing prepared by the customer.
Lock sprocket Structural drawing
  • By tightening the bolts with a torque wrench, the frictional force of taper sleeve provides a firm locking between the sprocket and shaft.
  • Can be mounted simply with no troublesome keyway processing on the shaft side for easy phase matching.
  • Can also be easily mounted and removed only by removing bolts.

Material and surface treatment

Lineup of specifications and materials to suit your application, such as steel, surface treatment, stainless steel and plastic.

standard steel Carbon steel for machine structural use
Surface treatment Carbon steel for machine structure use + Black oxide coating Available with finished bore (Sprocket Fit bore).
Carbon steel for machine structure use + electroless nickel-phosphorus plating Available with finished bore (Sprocket Fit bore).
Carbon steel for machine structure use + electro galvanizing (trivalent chromate treatment) Available with finished bore (Sprocket Fit bore).
Carbon steel for machine structure use + other special surface treatment
Environment resistant Stainless steel , titanium, other special materials
Plastic Engineering plastic  Nylon-based plastic  Special MC901 plastic (Blue)
※Only for RS35,40,50,60

Sprocket / Pin gear drive unit Product Lineup

Sprockets for Small Size Conveyor Chains

Here we introduce sprockets for small size conveyor chains.

Double pitch sprocket standard series with a wide range of lineups.

Double pitch sprocket Fit bore ready for customer use with finished shaft bore/keyway/tapped hole.

Fit bore BR type with finished bore for mounting bearings.

Double pitch Lock sprocket for easy shaft locking and phase matching without keys.

Other sprockets for dedicated chains include sprockets for Double Plus Chain/Center Roller Chain, sprockets for RS Chains with Outboard Rollers, sprockets for Double Pitch Chains with Top Rollers, sprockets for RS Attachment Chains, sprockets for Bearing Bush Chains, sprockets for Mini Tact Chains and sprockets for Indexing Table Chains are available.

Sprocket for Small size conveyor chain (Double Pitch sprocket )

for S rollers

for S rollers Sprocket

RF chain

RF chain (for S rollers )
(multi-engagement sprocket )

Double engagement

Double engagement

for R rollers

for R rollers Sprocket

RF chain

RF chain (for R rollers )

View product details
  • ・Special Sprocket for Double Pitch Chain.
  • ・Steel type using carbon steel for machine structural use, stainless steel type with excellent corrosion resistance, and plastic type that can be used with no additional lubrication, are available.
  • ・Shaft bore finishing is required before use.
  • ・Stainless steel type with improved wear-resistance is also available.
    Wear-resistant series Applicable size: RF2040 to RF2080 (S, R rollers)
Size

steel (S-roller ):
RF2040~RF2160

steel (R-roller ):
RF2040~RF2100

Stainless (S-roller ):
RF2040~RF2160

Stainless (R-roller ):
RF2040~RF2080

Engineering plastic (S-roller ):
RF2040~RF2060

View product details
Size

steel (S-roller ):
RF2040~RF2160

steel (R-roller ):
RF2040~RF2100

Stainless (S-roller ):
RF2040~RF2080

Stainless (R-roller ):
RF2040~RF2060

View product details

Fit bore BR type is a product with finished bore for mounting bearings.

Size

Made to order
steel (S-roller ):
RF2040~RF2160
steel (R-roller ):
RF2040~RF2100

View product details
  • ・Sprockets with a keyless locking device.
  • ・Frictional force on the tapered sleeve enables sprockets to lock to the shaft with no keys.
  • ・Can be mounted or removed with just the bolts.
Size

steel (S/R-roller ):
RF2040~RF2100

View product details
Size

steel :
RF2030VRP~RF2080VRP

View product details

Fit bore BR type is a product with finished bore for mounting bearings.

Size

Made to order
steel :
RF2030VRP~RF2080VRP

View product details
  • ・Special sprockets for RS Chain with Outboard Rollers
  • ・The outboard rollers of RS Chain with outboard rollers may interfere with the sprocket hubs depending on the number of sprocket teeth. Please use a specialized sprocket.
Size

steel :
RS40~RS100

View product details
  • ・Special sprockets for Double Pitch Chains with Top Rollers
  • ・R Rollers on Double Pitch Chain with Top Rollers may cause interference with standard sprocket teeth. Use this special sprocket instead.
Size

steel :
RF2040R~RF2100R

View product details

R rollers can be used with Double Pitch Chain Sprockets.