Enerpac RC-1012 300884 10 Ton Cylinder S/A

No. This category mixes Enerpac ranges with different ratings. Industrial cylinders such as the RC, RCS, RCH and RD series are rated 10,000 psi (700 bar). RW, BRW and RWH cylinders and most workholding clamps, including CST and CDT threaded cylinders, CSB and CDB block cylinders, HCS hollow cylinders, MRS clamping cylinders and PTSD pull cylinders, are rated 5,000 psi (350 bar). The CY and CYDA cylinders are lower again: the CYDA15 is rated 3,000 psi. AHB and B series boosters run from 1,600 to 5,000 psi depending on the model. Enerpac's instructions say never to connect a cylinder to a pump with a higher pressure rating, so check the Maximum Operating Pressure on the product page and make sure the pump, hoses, valves and gauge suit the lowest rated part.

The letters give the series and the digits give the capacity class in tons, then the nominal stroke in inches. RC is general purpose single-acting, RCS low height, RCH hollow plunger, RR double-acting, RRH double-acting hollow, RD double-acting general purpose, RSM Flat-Jac, LPL lock nut pancake, RAC and RAR aluminum, HCG, HCR and HCL high tonnage. RC308 is a 30 ton class cylinder with an 8.25 in stroke (rated 32.4 tons). Enerpac calls these nominal tonnage and stroke references that may not be accurate for every cylinder, and the split is not always obvious: RC106 is 10 ton with a 6 in stroke, but RC1006 is 100 ton with a 6.63 in stroke. Check capacity and stroke on the product page. RC-1010 and RC1010 are the same. Workholding codes such as CST follow a different scheme.

S/A is single-acting: oil pushes the plunger out and a spring or the load returns it. These need one hose and a pump with a 3-way valve. D/A is double-acting: oil drives the plunger both out and back, so it needs two hoses and a pump with a 4-way valve. Enerpac warns never to pressurize a double-acting cylinder with only one hose connected. In this category RC, RCH, RCS and CST models are single-acting, while RR, RRH, RD, BRD and CDT models are double-acting. A double-acting cylinder also gives a powered retract stroke rather than relying on spring or load.

Many Enerpac industrial cylinders ship with a CR-400 female coupler half (3/8 in NPTF) and a dust cap; the RC repair parts sheets list a CR400 coupler and CD411 dust cap on each model. Enerpac says what is supplied varies with the complete model number, so check the listing for your cylinder. The CR-400 mates with the CH-604 male half fitted to Enerpac hoses such as the HC-7206, and the pair is sold together as the C-604. Workholding cylinders are plumbed differently: Enerpac CSB, CDB and PSB block cylinders, for example, have BSPP oil ports plus manifold mount ports, so they take fittings rather than a CR-400. Check the port details for the exact model before ordering hoses.

For its lifting cylinders Enerpac states that rated load and stroke are maximum safe limits and that good practice is to use only 80% of them. Its cylinder instructions say a cylinder used to lift a load must never be used to hold it: once the load is raised or lowered, block it mechanically with rigid steel or wood blocks that can support the load. Lock nut cylinders such as the LPL, HCL and HCRL series are designed to support the load mechanically on the lock nut. On lifting cylinders always use a saddle to protect the plunger and avoid off-center loads. Workholding clamps and block cylinders have their own instruction sheets; follow the limits in them.