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RCH RRH Series:

Hollow Plunger Hydraulic Cylinders for Universal Dual-Action Needs Across Industries

A hollow plunger hydraulic cylinder provides both pull and push forces, delivering versatile bidirectional power. It is essential for construction, industrial machinery, agriculture, and material handling systems that require a central passthrough.

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Hollow Plunger Cylinders: Dual-Force Versatility in Motion with precision power control

Hollow plunger hydraulic cylinders provide versatile force solutions for tensioning, testing, lifting, and pulling applications across industries. Their unique hollow design allows the plunger to accommodate rods, cables, or bolts, enabling both push and pull operations within a single compact unit. These cylinders are ideal for construction, manufacturing, and maintenance tasks—such as bridge cable tensioning, industrial machinery alignment, and structural testing. Available in single or double-acting configurations with high-alloy steel or lightweight anodized aluminum bodies, hollow plunger hydraulic cylinders deliver precision, adaptability, and reliability in challenging environments.

Hollow plunger, Single-acting

RCH-Series

Durable single-acting hydraulic cylinders engineered for heavy lifting, pressing, and pushing tasks. Built to maximize productivity with advanced protective features.

Capacity: 5 – 100 tons

Stroke: 0.63 – 14.25 inches

Hollow plunger, Double-acting

RRH-Series

Double-acting hydraulic cylinders with rapid precision retraction control. Rugged designs for demanding construction and manufacturing applications.

Capacity: 10 – 500 tons

Stroke: 2.25 – 48 inches

Schmidt hollow plunger hydraulic cylinder RCH Series(Single-acting)

Schmidt RCH Series: Streamlined single-action hollow plunger hydraulic cylinders for efficient tensioning, lifting, and pressing tasks with passive retraction.

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Effortless Mounting

RCH Hollow plunger cylinders feature precision collar threads, enabling swift, secure fixture integration in complex hydraulic systems.

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Auto-Retract Simplicity

Single-acting hollow plunger cylinders utilize spring return for reliable, maintenance-free retraction in tensioning applications.

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Superior Corrosion Defense

Baked enamel finish protects hollow plunger cylinders, significantly enhancing corrosion resistance in harsh industrial environments.

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Core-Pass Integration

Enables internal routing of hoses/cables through the plunger’s core, saving ~70% external space and reducing clutter/traps.

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ultra-compact

Enables ultra-compact installations in confined machinery spaces where traditional cylinders cannot fit.

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Bidirectional Force

Hollow plunger hydraulic cylinders leverage their central bore to deliver unmatched bidirectional push/pull forces, enabling versatile tensioning, pressing, and lifting in confined industrial setups.

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Enhanced Component Longevity

Premium-grade nickel plating on floating center tubes for 20+ ton hollow plunger cylinders drastically reduces friction and wear, extending service life during continuous heavy-duty cycles.

6 core features of hollow plunger hydraulic cylinder

Hollow plunger hydraulic cylinders enable cable and rod threading for tensioning, testing, and alignment in construction, manufacturing, and renewable energy installations, offering unique central passage functionality.

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Secure Load Stability

Integrated smooth saddles across most RCH-series hollow plunger cylinders prevent load displacement, ensuring operational safety and precision in critical applications.

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Corrosion Defense

Baked enamel finishing on all hollow plunger hydraulic cylinders creates an impervious barrier against chemicals, moisture, and abrasion for reliability in extreme environments.

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Optimized Portability

Single-acting pump configurations significantly reduce hollow plunger cylinder weight while maintaining power, offering ergonomic transport benefits and on-site maneuverability.

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Fluid Integration

Complete high-pressure hose kits guarantee leak-free compatibility with hollow plunger hydraulic cylinders, maximizing flow efficiency and safety in complex hydraulic circuits.

RRH-Series – double-acting Hollow plunger hydraulic cylinder

RRH Series Hollow Hydraulic Cylinders offer double-acting operation for fast, controlled plunger extension/retraction. Made from durable steel with baked enamel corrosion-resistant coating, they feature collar threads and base holes for fixturing. The hollow plunger enables push/pull forces in heavy-duty industrial applications.

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Rapid Return

Double-acting design ensures swift, controlled plunger retraction for efficiency.

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Easy Mounting

Integrated smooth saddles simplify cylinder installation and positioning process.

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Extended Lifespan

Nickel-plated floating center tube reduces wear and corrosion, boosting durability.

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Corrosion Shield

Baked enamel finish significantly enhances rust resistance in harsh environments.

Cylinder Capacity ton (kN)	Stroke (mm)	Model Number	Cylinder Effective Area (cm2)	Oil Capacity (cm3)
12 (125)	8	RCH120	179	14
	42	RCH121 *	179	75
	42	RCH1211	179	75
	76	RCH123	179	136
20 (215)	49	RCH202 *	307	150
	155	RCH206	307	476
30 (326)	64	RCH302 *	466	298
	155	RCH306	466	722
60 (576)	76	RCH603 *	823	626
	153	RCH606	823	1259
95 (931)	76	RCH1003 *	1,330	1011

Cylinder Capacity ton	Stroke (mm)	Model Number	Max. Cylinder Capacity (kN)		Cylinder Effective Area (cm2)		Oil Capacity (cm3)


			Advance	Retract	Advance	Retract	Advance	Retract
30	178	RRH307	326	213	466	304	829	541
	258	RRH3010	326	213	466	304	1202	784
60	89	RRH603	576	380	823	542	733	482
	166	RRH606	576	380	823	542	1366	900
	257	RRH6010	576	380	823	542	2115	1393

95	38	RRH1001	931	612	1,330	874	505	333
	76	RRH1003	931	612	1,330	874	1011	666

	153	RRH1006	931	612	1,330	874	2035	1337
	257	RRH10010	931	612	1,330	874	3420	2246

145	203	RRH1508	1429	718	2,041	1,026	4144	2083

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