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    Products   Miniature to Small Drive Components Roller Chain, Ladder Chain, Metal Sprockets and Lightweight Plastic Sprockets

Miniature to Small Drive Components

Roller Chain, Ladder Chain, Metal Sprockets and Lightweight Plastic Sprockets

Chains & Sprockrets
SDP/SI specializes in servicing the users of commercial quality small to miniature chain drive components. Chain drives are often used where positive synchronization between shafts and transmission of substantial torque is required.

The most economical chain drive selection usually consists of a combination of:
  • The shortest pitch single strand chain which has the required “design horsepower” rating when used with the desired size sprocket at the selected sprocket speed.
  • The selection of a center-distance that insures a chain wrap of at least 120° (meshing with at least 1/2 of the teeth) on the smaller sprocket.

When selecting sprockets:
  • For long service life and smooth performance, select sprockets with 17 or more teeth, but less than 67.
  • When space limitations are a factor or running at slow speeds, sprockets with less than 17 teeth can be used.

Chain life will vary appreciably depending on the way the drive is lubricated. A properly lubricated chain can last more than 100 times as long as the same chain with poor lubrication.

Ladder chain links interlock and are fabricated from wire. Ladder chain is inexpensive and easy to install and can be found in many household appliances, vending machines and various timing and electrical devices.

SDP/SI offers a wide selection of inch and metric dimensioned roller chain and ladder chain. To complete your drive system both plastic sprockets and metal sprockets designed to work with the chain are available.

Correct operating tension is an important factor in the satisfactory performance and life of a drive system. SDP/SI offers chain and belt tensioning products, as well as tension monitoring tools.

Our engineering staff is available to assist you in selecting the best components for your drive system.


Commercial Chain Tensioners

Commercial Chain Tensioners


A variety of chain tensioners are offered by SDP/SI. Maintaining proper chain tension protects equipment and results in long and trouble-free operation of drive systems.


Commercial Ladder Chains

Commercial Ladder Chains


We offer a large selection of ladder chain in various materials, pitches and lengths. Plastic sprockets and metal sprockets are also available.


Commercial Ladder Chain Sprockets

Commercial Ladder Chain Sprockets


SDP/SI offers plastic, steel, Stainless Steel and brass ladder chain sprockets. Sprockets and ladder chain are available off-the-shelf in a wide variety of pitches, bore sizes and number of teeth.


Commercial Roller Chains

Commercial Roller Chains


Molded subminiature roller chain, miniature roller chain, plastic roller chain, stainless steel and hardened steel roller chain are offered here. Find the roller chain and roller chain sprocket for your power transmission system.


Commercial Roller Chain Sprockets

Commercial Roller Chain Sprockets


Inch and metric sized sprockets designed to operate with roller chain are available as standard catalog items. A broad selection of materials, sizes, number of teeth and pitches are offered. Bore sizes start as small as 3/32 (inch). Plastic and metal roller chains are also available. Can't find a standard to meet your needs – our engineering staff can offer alternative solutions from simple modifications to custom design, engineering and manufacturing.