{"id":2366,"date":"2026-06-30T08:43:09","date_gmt":"2026-06-30T08:43:09","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/product\/hydraulic-press-return-cylinder\/"},"modified":"2026-06-30T08:43:10","modified_gmt":"2026-06-30T08:43:10","slug":"hydraulic-press-return-cylinder","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/it\/prodotto\/hydraulic-press-return-cylinder\/","title":{"rendered":"Hydraulic Press Return Cylinder"},"content":{"rendered":"

<\/p>\n

<\/p>\n

\n
\n Hydraulic Press \u00b7 Return Cylinder<\/span><\/p>\n

The Stroke Nobody
Talks About<\/h2>\n

Everyone measures a press by its downward force \u2014 40 MN, 60 MN, 80 MN. But the return stroke is what sets the cycle time. A press that takes 5 seconds to retract instead of 3 seconds loses 40% of its potential output. The return cylinder is the difference between a productive press and one that waits.<\/p>\n

\n
\n
Plunger Type<\/div>\n
\u2205 140\u2013360 mm<\/div>\n
Thrust \u2264 3,206 KN \u00b7 Stroke \u2264 3,000 mm<\/div>\n<\/p><\/div>\n
\n
Piston Type<\/div>\n
\u2205 180\u2013410 mm bore<\/div>\n
Rod 120\u2013360 mm \u00b7 Thrust \u2264 2,612 KN \u00b7 Stroke \u2264 4,500 mm<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

What the Return Cylinder Does<\/h2>\n

The hydraulic press cycle has two halves: the press stroke (ram moves down, workpiece is formed) and the return stroke (ram moves back up to top dead centre, ready for the next cycle). The master cylinder and side cylinders handle the press stroke. The return cylinder handles everything after \u2014 lifting the ram, the tooling, and the upper die back to the starting position so the operator can remove the finished part and load the next blank.<\/p>\n

On a large forging press, the ram assembly alone can weigh 50\u2013200 tonnes. The return cylinder must overcome this weight plus any friction and hydraulic resistance in the system. The return force is much smaller than the pressing force (kilonewtons, not meganewtons), but it must be reliable and fast \u2014 because the return stroke is non-productive time. Every second of return time is a second the press is not making parts. Korea Ever-Power manufactures return cylinders as part of the complete industrial engineering hydraulic cylinder<\/a> set for press builders.<\/p>\n

\"Hydraulic
\n<\/section>\n

<\/p>\n

\n

Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nPiston Type<\/th>\nPlunger Type<\/th>\n<\/tr>\n<\/thead>\n
Function<\/td>\nReturn force for master cylinder and side cylinders<\/td>\n<\/tr>\n
Bore \/ Plunger<\/td>\nBore 180\u2013410 mm
Rod 120\u2013360 mm<\/td>\n		Plunger 140\u2013360 mm<\/td>\n<\/tr>\n
Stroke<\/td>\n\u2264 4,500 mm<\/td>\n\u2264 3,000 mm<\/td>\n<\/tr>\n
Max Thrust<\/td>\n2,612 KN (bore 410 mm \/ 31.5 MPa)<\/td>\n3,206 KN (plunger 360 mm \/ 31.5 MPa)<\/td>\n<\/tr>\n
Working Pressure<\/td>\nUp to 31.5 MPa<\/td>\n<\/tr>\n
Certification<\/td>\nISO 9001 \u00b7 100% hydrostatic tested<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/section>\n

<\/p>\n

\n

Two Configurations \u2014 Plunger Type vs Piston Type<\/h2>\n

The return cylinder is available in two fundamentally different configurations. The choice depends on the press geometry, the return force required, and whether the cylinder needs to pull (piston type) or push (plunger type) the ram upward.<\/p>\n

\n
\n
\n

Plunger Type Return Cylinder<\/h3>\n<\/div>\n
\n

A single-acting cylinder with a solid plunger (no hollow rod). Hydraulic pressure extends the plunger upward, pushing the ram toward top dead centre. The press stroke (downward) retracts the plunger by gravity and the master cylinder’s force. Plunger type return cylinders are simpler (fewer seals \u2014 only a plunger seal and wiper), more compact, and preferred when the return cylinder is mounted below the ram and pushes upward.<\/p>\n

\n Single-acting<\/span>
\n Pushes up<\/span>
\n Fewer seals<\/span>
\n \u2264 3,000 mm stroke<\/span>\n <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\n
\n

Piston Type Return Cylinder<\/h3>\n<\/div>\n
\n

A double-acting cylinder with a bore, piston, and rod. Can both extend and retract under hydraulic power \u2014 providing controlled force in both directions. Piston type return cylinders are used when the press design requires the return cylinder to pull the ram upward (rod connected to the ram, cylinder body fixed to the frame) or when controlled lowering speed is needed during the press stroke.<\/p>\n

\n Double-acting<\/span>
\n Pulls up or pushes<\/span>
\n Controlled both ways<\/span>
\n \u2264 4,500 mm stroke<\/span>\n <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\n How to choose: <\/strong>
\n If the return cylinder mounts below the ram and pushes upward \u2014 plunger type (simpler, lower maintenance). If the return cylinder mounts above and pulls the ram up via a rod connection, or if controlled downward speed is needed \u2014 piston type (more versatile, longer stroke available). Korea Ever-Power’s engineering team recommends the optimal type based on your press frame geometry.<\/span>\n <\/div>\n<\/section>\n

<\/p>\n

\n

Why Return Speed Determines Your Output<\/h2>\n
\n \"Return<\/p>\n

A press cycle consists of: approach (fast descent), forming (slow, high-force pressing), dwell (hold at pressure), return (ram lifts), and part handling (operator loads\/unloads). The forming and dwell phases are determined by the process \u2014 they cannot be shortened without changing the product quality. The return phase, however, is pure machine overhead. Shortening it directly increases throughput.<\/p>\n

Return speed is determined by the return cylinder’s effective area and the available hydraulic flow. A larger plunger or bore diameter (larger area) means a slower return at the same flow \u2014 the cylinder must fill more volume per millimetre of stroke. Conversely, a smaller return cylinder retracts faster but provides less return force. The optimisation challenge is to select the smallest return cylinder that still provides enough force to reliably lift the ram assembly \u2014 maximising speed without compromising reliability.<\/p>\n

On a press producing 200 forgings per shift with a 3-second return stroke, reducing the return to 2 seconds saves 200 seconds per shift \u2014 enough for approximately 18 additional forgings. Over a year of production, that translates to thousands of additional parts from the same press, with no change to the forming process. The return cylinder is the lowest-cost productivity upgrade on most hydraulic presses. Contact the hydraulic press cylinder specialist<\/a> for return speed optimisation.<\/p>\n<\/p><\/div>\n

<\/div>\n<\/section>\n

<\/p>\n

\n
\n

Maintenance Focus \u2014 The Return Cylinder Wears Differently<\/h2>\n

The return cylinder operates under very different conditions from the master and side cylinders \u2014 and its wear patterns reflect this. Understanding these differences helps you schedule maintenance correctly and avoid unexpected downtime.<\/p>\n

\n
\n Lower pressure, higher frequency<\/strong><\/p>\n

The return cylinder operates at much lower pressure than the master cylinder (it lifts the ram weight, not forges the workpiece). But it cycles at exactly the same frequency \u2014 every press stroke requires a return stroke. Lower pressure means less seal extrusion, but higher cycle count means more cumulative seal wear. Return cylinder seals typically last as long as master cylinder seals despite the lower pressure \u2014 the cycle count balances the pressure difference.<\/p>\n<\/p><\/div>\n

\n Contamination exposure from the press environment<\/strong><\/p>\n

On forging presses, the return cylinders are often mounted in exposed positions \u2014 below the bolster or alongside the frame \u2014 where they are subjected to scale, forge spray (water\/graphite lubricant), and radiant heat from the hot workpiece. This environmental exposure accelerates wiper seal degradation and barrel corrosion faster than the master cylinder, which is typically mounted inside the press crown (more protected). Inspect return cylinder wipers and barrel finish more frequently than master cylinder seals.<\/p>\n<\/p><\/div>\n

\n Seal kits \u2014 order return and master together<\/strong><\/p>\n

When scheduling a press overhaul, replace the return cylinder seals at the same time as the master and side cylinder seals \u2014 even if the return seals appear to have remaining life. The labour cost of disassembly is the dominant expense; the seal kit cost is minor. Replacing all seals during a single shutdown eliminates the risk of a return cylinder seal failure between master cylinder overhauls.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n \"Return
\n<\/section>\n

<\/p>\n

\n

What Happens When the Return Cylinder Fails<\/h2>\n
\n \"Return<\/p>\n

A return cylinder failure does not create a safety emergency in the way a master cylinder failure might \u2014 the ram simply stays at the bottom of the stroke. But the operational consequences are severe:<\/p>\n

The press stops producing.<\/strong> The ram cannot return to top dead centre, so the press cannot cycle. Every minute of downtime on a large forging press costs hundreds to thousands of dollars in lost production.<\/p>\n

The workpiece may be trapped.<\/strong> If the ram stops at the bottom of the press stroke with the dies closed on a hot forging, the workpiece cools in the die \u2014 potentially welding itself to the die surface. Extracting a stuck forging requires additional equipment and risks die damage.<\/p>\n

Cascade delays.<\/strong> On integrated forging lines, a press stoppage blocks every upstream and downstream process \u2014 furnace scheduling, manipulator operations, trim press, and heat treatment sequencing are all disrupted. A 2-hour return cylinder repair can cost 8 hours of total line recovery time.<\/p>\n<\/p><\/div>\n

<\/div>\n<\/section>\n

<\/p>\n

\n

Manufacturing<\/h2>\n

\"Korea<\/p>\n

Return cylinders are manufactured alongside the master and side cylinders for each press order \u2014 sharing the same production batch, quality procedures, and test bench. The return cylinder’s bore or plunger diameter is smaller than the master cylinder, but the machining precision is identical: the same honing specification (Ra 0.2\u20130.4 \u00b5m), the same chrome plating on the plunger or rod, and the same seal groove tolerances. Every return cylinder is hydrostatic tested at 1.5\u00d7 working pressure with an individual test certificate. The complete cylinder set \u2014 master, side, and return \u2014 ships together with cross-referenced serial numbers for full traceability.<\/p>\n<\/section>\n

<\/p>\n

\n

OEM & ODM<\/h2>\n
\n
\n
\n

What You Provide<\/h3>\n<\/div>\n
\n

Ram weight (tonnes), return speed requirement (mm\/s or total return time), stroke, preferred type (plunger or piston \u2014 or let the engineering team recommend), mounting position (below bolster \/ above crown \/ frame-mounted), available hydraulic flow for the return circuit, and the master\/side cylinder specification (or order the complete set). For replacements: existing cylinder measurements or drawing number.<\/p>\n<\/div><\/div>\n

\n
\n

What the Factory Delivers<\/h3>\n<\/div>\n
\n

Engineering drawing with return cylinder type, bore\/plunger diameter, stroke, return speed calculation, and mounting dimensions. Manufactured as part of the press cylinder set or individually for replacements. 100% hydrostatic test. Seal kits for the return cylinder’s specific configuration. Browse all industrial press cylinders<\/a> including master, side, and return configurations.<\/p>\n<\/div><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

FAQ<\/h2>\n
\n
\n

How many return cylinders does a press typically use?<\/h3>\n

Typically 2 to 4, mounted symmetrically around the press frame to lift the ram evenly. The number depends on the ram weight and the desired return speed. More return cylinders of smaller diameter can achieve the same total force as fewer larger cylinders \u2014 but with faster return speed because each smaller cylinder fills its volume faster at the same system flow.<\/p>\n<\/p><\/div>\n

\n

Can the return cylinder also provide controlled downward force?<\/h3>\n

Only the piston type \u2014 which is double-acting and can generate force in both directions. This is used on presses where controlled lowering speed is required (preventing the ram from free-falling under gravity during the approach phase). The plunger type is single-acting and provides return (upward) force only \u2014 the downward stroke relies on gravity and the master cylinder<\/a> force.<\/p>\n<\/p><\/div>\n

\n

Do the return cylinders share the same hydraulic circuit as the master cylinder?<\/h3>\n

No \u2014 the return cylinders have their own dedicated hydraulic circuit with separate directional valves and flow controls. During the press stroke, the return circuit is vented (allowing the return cylinders to retract freely as the master pushes the ram down). During the return stroke, the master circuit is vented and the return circuit is pressurised. The press control system sequences these circuits automatically. This separation applies across all multi-cylinder hydraulic systems<\/a> including telescopic hoist configurations<\/a>.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

Related Categories<\/h2>\n
\n <\/p>\n
\n
\"Telescopic\"<\/div>\n
\n
Telescopic Hydraulic Cylinders \u2192<\/div>\n
Dump truck, trailer, hoist.<\/div>\n<\/div>\n<\/div>\n

<\/a>
\n <\/p>\n

\n
\"Forklift\"<\/div>\n
\n
Forklift Hydraulic Cylinders \u2192<\/div>\n
Lift, tilt, steer \u2014 OEM.<\/div>\n<\/div>\n<\/div>\n

<\/a>
\n <\/p>\n

\n
\"AWV\"<\/div>\n
\n
Aerial Work Vehicle Cylinders \u2192<\/div>\n
Scissor, boom, platforms.<\/div>\n<\/div>\n<\/div>\n

<\/a>\n <\/div>\n<\/section>\n

<\/main><\/p>","protected":false},"excerpt":{"rendered":"

Hydraulic press return cylinder \u2014 the actuator that lifts the press ram back to top dead centre after every forming stroke. Available in two configurations: plunger type (140\u2013360 mm, thrust up to 3,206 KN, stroke \u22643,000 mm) and piston type (bore 180\u2013410 mm, rod 120\u2013360 mm, thrust up to 2,612 KN, stroke \u22644,500 mm). The return cylinder’s speed determines the press cycle time \u2014 a faster return means more parts per hour. Korea Ever-Power manufactures return cylinders matched to the master and side cylinder set for coordinated press operation. ISO 9001. OEM & ODM.<\/div>","protected":false},"featured_media":2367,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[852],"product_tag":[],"class_list":["post-2366","product","type-product","status-publish","has-post-thumbnail","product_cat-industrial-engineering-hydraulic-cylinders","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/product\/2366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/comments?post=2366"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/media\/2367"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/media?parent=2366"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/product_brand?post=2366"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/product_cat?post=2366"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/it\/wp-json\/wp\/v2\/product_tag?post=2366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}