Product Info 　 Sprockets and Pin Gear Drive

A sprocket is a type of gear, also known as a chainwheel.

It is a mechanical element that can transmit the rotation of the shaft to the chain and the tension of the chain to the shaft.

Depending on whether or not a hub is included, there are types such as Type A (flat type), Type B (single hub type), and Type C (double hub type).

It is available in high strength and corrosion resistant specifications, and can be used in a variety of situations.

*Sprockets for Plastic modular chain, Top chain, and Plastic block chain can be viewed on the product page for each chain.

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Sprocket and Pin gear drive related information

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Features

  • When used for Drive chain transmission, a large reduction ratio can be achieved by combining different numbers of teeth (generally up to 1:7).
  • ・You can choose from a wide lineup of products, including not only pilot bore products but also products with machined shaft holes and additionally machined shaft holes (steel, stainless steel, resin, surface treatment, etc.).
  • -We offer a lineup of materials and specifications to suit your application.
  • ・Sprockets for pin gears with special tooth profiles can be used in combination with attachment chains, pin racks, and pin wheels for linear and rotary drive applications rather than power transmission purposes.
    You can use it.

Structure

RS sprockets come in four types of structures specified by JIS.

Model code A-type
(flat plate type)		 B type
(Single hub type)		 C type
(double hub type)		 SD type
(single dual)
Structure A-type B type C type SD type
RS-HT chain (SUPER-H, HT, etc.) multiple strand Note 1 A shape that allows two single strand chains to be hung at the same time
HB type HC type
Use depending on the structure It is used when attaching to a rotating body such as the center member of a torque limiter. It is the most versatile. Used when the key surface pressure is insufficient with the large driven sprocket or B type. It is used by hanging two single strand chains at the same time.

Note
1. The total tooth width (transverse pitch) of RS-HT chain multiple strand (HB type, HC type) is different from the standard.

Shaft fastening method

There are three types of shaft hole specifications for mounting a sprocket to a mating shaft:

series Exterior Specification
Standard pilot bore Structural diagram
  • Additional machining of the shaft hole is required for use.
Fit Bore​ Structural diagram Structural diagram
  • The details of shaft hole processing and bearing hole processing are coded, allowing for accurate ordering by model number.
  • Our lineup of shaft hole processing includes finished shaft hole products and additionally processed shaft hole products.
  • The shaft hole, keyway, and tapped holes are already processed, so it can be used immediately after delivery.
  • The bearing bore is a precisely finished housing hole, so you can insert your own bearing and use it immediately.
Lock Sprocket Structural diagram
  • By tightening the bolt with a torque wrench, the frictional force of the tapered sleeve firmly fastens the sprocket to the shaft.
  • It can be installed without the need for troublesome key processing on the shaft side, and phase alignment is easy.
  • In addition, installation and removal can be easily done by simply attaching and removing the bolts.

Material and surface treatment

We offer a lineup of specifications and materials to suit your application, including steel, surface-treated, stainless steel, and resin.

Standard steel Carbon steel for machine structures
Surface Treatment Carbon steel for machine structures + black oxide finish You can choose from shaft hole processed products (sprocket Fit Bore).
Carbon steel for mechanical structures + electroless nickel-phosphorus plating You can choose from shaft hole processed products (sprocket Fit Bore).
Carbon steel for mechanical structures + electrogalvanized (trivalent chromate treatment) You can choose from shaft hole processed products (sprocket Fit Bore).
Carbon steel for machine structures + other special surface treatments
Environmental resistance Stainless steel, titanium, and other special materials
resin Engineering plastic nylon resin MC901 special (blue)
*Only for RS35, 40, 50, 60

Sprocket and Pin gear drive product list

Drive sprocket

Here we introduce sprockets for Drive chain.

We offer a wide range of standard series to choose from, Fit Bore with pre-machined shaft holes, keyways and tapped holes for immediate use by the customer, Fit Bore BR type with pre-machined holes for bearing installation, Lock Sprocket that allow shaft fastening without a key and easy phase alignment, sprockets specifically for BS standard chains, sprockets specifically for torque limiters, and chain tensioners and idlers.

Standard series (pilot bore)

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Product Info here

RS​ roller chains are best suited to RS​ sprockets.

You can choose from a wide range of products to suit your needs.

  • *Steel type:
    General-purpose type. Hardened tooth tip specifications are also available for improved wear resistance.
  • * TOUGH TOOTH:
    It has improved strength and durability, primarily for Heavy duty drive chain.
  • *Stainless steel type:
    It is mainly used in combination with stainless steel chains.
    We also offer "wear-resistant specifications" that use stainless steel with excellent corrosion resistance and have improved wear performance.
    Note: Please use surface treated sprockets for coated chains.
  • *Engineering plastic type:
    Made of nylon resin, it can be operated without lubrication and is suitable for light load applications.
  • *Surface treatment specifications (special product):
    Depending on the corrosion resistance required, you can choose from black oxide, electroless nickel-phosphorus plating, electro-galvanized trivalent chromate treatment.
  • * Indicator pins specifications​:
    This sprocket comes with a replacement notification mark.
  • * Shaft mounted sprocket:
    The shaft is manufactured together with the sprocket and delivered together.
size

Steel Type:
RS15 to RS240
RF06B to RS16B

Stainless steel type:
RS11
RS25 to RS80

Engineering plastic type:
RS35 to RS60

​​RS Sprocket Fit Bore ​

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Product Info here

Fit bore is​ a processed shaft hole product.

size

In stock:
RS35 to RS100

Quick delivery models/made to order products
single strand type:
RS35 to RS240
RF06B～16B
2-row type:
RS40 to RS120
RS08B～16B
SD type:
RS40 to RS80

Stainless steel single strand type:
RS35 to RS80

​​RS Sprocket Fit Bore BR Type​ 

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Product Info here

Fit bore ​BR type is a product with holes machined for mounting bearings.

size

Quoted on a case-by-case basis
single strand type B
RS35 to RS160

Lock Sprocket

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A sprocket integrated with a keyless fastener.

The friction of the tapered sleeve allows it to be fastened to the shaft without a key. Phase alignment is also easy.

  • *S type: Strong fastening with bolts, compatible with a wide range of shaft diameters
  • *N type: Easy to fasten with a nut, suitable for small diameter shafts
size

S-type:
RS35 to RS100

N-type:
RS35 to RS60

Other Special Ssprockets

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Product Info here

Various dedicated sprockets are available.

  • *BS chain sprocket: BS/DIN standard product
  • * Torque Limiter sprocket: Center member friction surface finished
size

Please refer to the Product details page.
​

Chain Tensioner / Idler wheels

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A wide range of chain drive essentials

  • ☆Chain tensioner
    • *CT-TCS type: Oscillating type, with idler sprocket
    • *CT-ETS type: Direct acting, with idler sprocket
    • *CT-TA type: Direct acting type with plastic shoe
    • *CT-TH type: Idler sprocket can be selected
  • ☆Idler
    • *FR idler sprocket: Two types: ball bearing specification and oil-less bush specification