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Ramseys popular line of wear protected chains recently expanded to include a unique new conveying chain. Branded the Sentry line, this chain combines the best features of established Allguard FX and two pin conveying chains with features developed for high speed power transmission chain.
Features of Sentry Chain
Guard links with fully recessed pin heads
100% hardened alloy steel construction- no sintered metal
Two pin chain joints
1 and 12 pitch designs
Staked pin heads
Pre-stressed for reduced chain elongation

Developed Especially for Customers Preferring Two Pin Conveying Chains
Following the success of Ramseys established wear protected chains, customers who prefer two pin chain designs challenged Ramseys engineers to come up with a new chain. In response, our engineers developed an all steel, two pin chain design that offers the same wear protection as Lifeguard and Allguard FX. Unique in the industry, Sentry chains blend features which have been successfully used in Ramsey glass conveying chain for decades with totally new features which are only available from Ramsey. No other company offers chains comparable to Sentry!


Wear Protection - And Much More
Sentry chains utilize time tested assemblies, two pin joint designs, and wear protected recessed pin heads to produce chains that are strong, durable, and resistant to wear. In addition, the pin heads in the chains are staked using proprietary technology developed by Ramsey. Staked heads are very durable and more compact than heads formed by other methods. And since the pin heads are recessed, they will not wear like pin heads in laser weld style chains. Also, the guard links on Sentry chains are hardened alloy steel. No sintered metal parts are used in the chain. This results in a more robust and impact resistant chain. Lastly, Sentry chains are pre-stressed during manufacturing to fully seat components and to reduce chain stretch.

Compatible With Existing Sprockets
Sentry conveying chains are fully interchangeable with similar existing chains and sprockets. Chains can be made with or without spacers and can operate with center guide or side guide sprockets.

Ordering R-select Chain the first time
When placing an initial order, we recommend you contact a Ramsey customer service representative who will help you select a chain which best fits your application.

Ramsey offers made to order roller chain sprockets, gears, and pulleys. There is no minimum order quantity and parts can be machined from the material of your choice, to your exact specifications. Tooth hardening is available.

Contact Sales for more information.


38" pitch through 1 12" pitch roller chain sprockets
Spur gears 16 through 4 DP
Helical Gears
Splines
Tolerances to AGMA class 10

Stock and Made to Order
Ramsey offers a full range of stock and made to order sprockets in pitches ranging from 316 pitch to 2 14 pitch. Stock sprockets are available with minimum plain bores or taper lock bushings. For an additional charge they can be machined with a finished bore and keyway. Made to order sprockets provide an almost unlimited range of options and are a large part of our daily production.Ramsey also supplies sprockets to replace most competitors' products. We welcome all inquiries.

Materials
RPV, RP and SC sprockets are typically made from carbon steel or ductile iron, with sprocket teeth hardened to Rockwell hardness of Rc 50. For RP and SC only, some sprocket sizes are available in class 30 gray iron with unhardened teeth. Other materials are available subject to customer preference, sprocket size, cost, and availability.

Performance Guidelines
In general, larger sprocket diameters will provide for smoother operation, less vibration, and longer life. We recommend using sprockets with at least 21 teeth whenever possible. Also, to assure proper meshing of sprockets and chain we recommend they be purchased from the same source.

Guide Type
Similar to chains, most sprockets fall into one of two categories: center guide or side guide.

Center Guide: A groove machined in the center of the sprocket face accepts the chain's center guide link. Two grooves are machined for two center guide. Side Guide The sprocket fits between the chain's side guide plates.
Side Guide: The sprocket fits between the chain's side guide plates.

Rampower duplex, also known as RP duplex, provides approximately two times the power capacity of standard SC duplex chain. RP duplex is often well suited for new or replacement applications where power or speed requirements exceed the capability of SC duplex chain.