PRE-PRESS SEPARATED TYPE

JRH Pre-Press Separated Hydro-Pneumatic Booster

Two-stage pre-press booster with separated hydraulic cylinders. The booster body mounts horizontally while JRYG cylinders install at any angle — supporting one-to-multiple configurations for distributed press-fitting and clamping.

ISO 9001:2015 2-Year Warranty Direct from Manufacturer Custom Designs Available

7.7:1 – 41.1:1 Boost Ratio Range

Ø63–180 mm Air Cylinder Bore

70–2535 cc Oil Displacement

1-to-N Multiple Cylinders

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Design Philosophy

Why Choose a Separated Booster?

When the actuator must live where the booster cannot, a separated architecture delivers both high force and layout freedom.

Integrated Cylinder

JRA / JRE — all-in-one units where the air cylinder, oil chamber, and output rod share one body. Compact and simple, but the entire unit must mount at the work point in a fixed orientation.

JRH Separated Booster

The booster body stays remote — horizontally mounted on the machine frame — while compact JRYG hydraulic cylinders deliver force exactly where needed, at any angle, even in groups.

Two-Stage Pre-Press Action

Fast low-force approach followed by high-pressure boost — controlled by DT1 (pre-press) and DT2 (power stroke) for staged, energy-efficient operation.

Separated Installation

Booster body mounts horizontally; JRYG oil cylinders install at any angle. Ideal when the work point is too small, hot, or awkward for an integrated cylinder.

One-to-Multiple Output

A single JRH booster can drive 1, 2, 3, or more JRYG cylinders simultaneously — perfect for distributed clamping, multi-point press-fitting, and brake/clutch systems.

7 Boost Ratios Available

From 7.7:1 to 41.1:1 — match the ratio to your required output force and oil volume without oversizing the air cylinder.

Clean, Oil-Mist-Free

Hydraulic oil stays sealed in the closed circuit. No oil mist exhaust — suitable for clean-rooms, electronics assembly, and food-adjacent automation.

Built to Order

Non-standard boost ratios, oil volumes, cylinder strokes, and mounting configurations available. Every unit is ISO 9001:2015 certified and backed by a 2-year warranty.

Technical Data

Technical Specifications

Performance

Actuation Type	Single-acting (booster body)
Boost Ratio Range	7.7:1 – 41.1:1
Oil Displacement	70 – 2535 cc
Operating Speed	50 – 450 mm/s
Cycle Rate	25 – 45 cycles/min

Fluid & Control

Working Medium	Compressed air (40 µm filtered)
Operating Pressure	4 – 7 kgf/cm²
Control Valves	2 × two-position 5-way solenoid (DT1 + DT2)
Air Cylinder Proof Pressure	30 kgf/cm²
Lubrication	Oil-mist-free (closed oil circuit)

System Configuration

Booster Bore Options	Ø63 / 80 / 100 / 125 / 160 / 180 mm
Matched Cylinder Bore	Ø63 / 80 / 100 / 125 mm (std.)
Matched Cylinder Stroke	5 – 30 mm (std.), custom to 400 mm
Booster Mounting	Horizontal
Cylinder Mounting	Any angle (flange mount)

Operating Temperature: 0 – 60 °C | Body Material: Aluminum alloy | Pre-press Stroke Tolerance: +1.00 / 0.00 mm | Power Stroke Tolerance: +0.20 / 0.00 mm

Selection Matrix

Boost Ratio & Oil Displacement

Oil displacement (cc) is determined by the combination of air cylinder bore and boost ratio. Find your required oil volume, then read off the corresponding ratio and bore.

Bore \ Ratio	L07 7.7:1	L16 16.6:1	L20 20:1	L25 25.4:1	L28 28.4:1	L36 36.4:1	L41 41.1:1
Ø80 mm	70 cc	120 cc	200 cc	350 cc	430 cc	584 cc	738 cc
Ø100 mm	85 cc	146 cc	242 cc	423 cc	520 cc	692 cc	880 cc
Ø125 mm	120 cc	206 cc	340 cc	595 cc	732 cc	972 cc	1234 cc
Ø160 mm	215 cc	369 cc	610 cc	1068 cc	1314 cc	1740 cc	2210 cc
Ø180 mm	217 cc	423 cc	699 cc	1225 cc	1507 cc	1995 cc	2535 cc

Values are reference oil displacement at full stroke. Actual high-pressure output per cycle depends on matched cylinder bore and power-stroke setting. Confirm with our engineering team for critical applications.

Circuit Diagram

Pneumatic-Hydraulic Circuit

Circuit Components

SRC
Compressed Air Source
Plant air supply, 4–7 kgf/cm²
FRL
Air Treatment Unit
Filter · Regulator · Lubricator
DT1
Solenoid Valve DT1
Controls pre-press section — drives fast approach stroke
DT2
Solenoid Valve DT2
Controls booster section — engages high-pressure stroke
C
Oil Reservoir Port
Air-to-oil conversion chamber (top of vertical reservoir)
A
Cylinder Port A
Hydraulic oil inlet to JRYG cylinder
B
Cylinder Port B
Hydraulic oil return from JRYG cylinder
PG
Hydraulic Pressure Gauge
Monitors boosted oil pressure at the cylinder

Flow path: Air source → FRL → split to DT1 & DT2 → DT1 to reservoir (C), DT2 to booster air cylinder → closed oil loop between reservoir and JRYG cylinder(s) via ports A & B.

Working Cycle

4-Step Operation Sequence

JRH uses a pre-press two-valve sequence: DT1 handles the fast approach, DT2 engages the high-pressure boost, then both reset in order.

Pre-Press Approach

DT1 ON DT2 OFF

DT1 energizes. Air pressure acts on the oil surface in the reservoir, pushing hydraulic oil through port A to the JRYG cylinder. The piston advances rapidly at low force until it contacts the workpiece.

High-Pressure Boost

DT1 ON DT2 ON

Resistance builds — DT1 holds while DT2 energizes. The booster air cylinder drives the intensifier piston, multiplying hydraulic pressure by the selected boost ratio. The JRYG cylinder outputs full force.

Pressure Release

DT1 ON DT2 OFF

After the required dwell/hold time, DT2 de-energizes. The booster section retracts, hydraulic pressure drops, and the system releases force on the workpiece while DT1 maintains position.

Return & Reset

DT1 OFF DT2 OFF

DT1 de-energizes. The air cylinder retracts, oil flows back through port B to the reservoir, and the JRYG piston returns to home. One complete cycle is finished and the system is ready for the next.

Installation Flexibility

System Configuration Options

The JRH system separates the power source from the actuator, giving you three dimensions of layout freedom.

Horizontal Booster Body

The JRH booster body mounts horizontally on the machine frame — away from heat, coolant, or space constraints at the work point. Standard foot or flange mounting.

Any-Angle Oil Cylinders

JRYG matched cylinders are flange-mounted and can be installed vertically, horizontally, upside-down, or at any custom angle. The oil circuit is fully sealed — orientation does not affect performance.

One-to-Multiple Output

Drive 1, 2, 3, or more JRYG cylinders from a single booster. All cylinders act in parallel — ideal for multi-point clamping, distributed press-fitting, and brake/clutch circuits with synchronized force.

Engineering Drawing

Booster Body Dimensions

Fixed dimensions (A–F) depend on bore only. Variable dimensions (G–J) and oil displacement change with the selected boost ratio. Switch between bore sizes below.

Fixed Dimensions (mm)

Parameter	Description	Value
A	Total width	80
B	Dimension B	95
C	Dimension C	70
D	Dimension D	165
E	Thread specification	M10
F	Air port thread	ZG3/8"

Dimensions by Boost Ratio (mm) & Oil Displacement (cc)

Ratio Code	Boost Ratio	G	H	I	J	Oil Disp.
L07	7.7:1	233.8	405	596	738	70 cc
L16	16.6:1	295	498	738	912	120 cc
L20	20:1	326	550	816	1008	200 cc
L25	25.4:1	369	622	924	1142	350 cc
L28	28.4:1	393	662	984	1216	430 cc
L36	36.4:1	434	730	1086	1344	584 cc
L41	41.1:1	454	764	1135	1405	738 cc

Fixed Dimensions (mm)

Parameter	Description	Value
A	Total width	116
B	Dimension B	95
C	Dimension C	70
D	Dimension D	185
E	Thread specification	M10
F	Air port thread	ZG3/8"

Dimensions by Boost Ratio (mm) & Oil Displacement (cc)

Ratio Code	Boost Ratio	G	H	I	J	Oil Disp.
L07	7.7:1	252.8	434	654	807	85 cc
L16	16.6:1	323	536	807	998	146 cc
L20	20:1	360.5	598	898	1110	242 cc
L25	25.4:1	408	677	1016	1256	423 cc
L28	28.4:1	435	722	1083	1339	520 cc
L36	36.4:1	480	797	1195	1478	692 cc
L41	41.1:1	502	834	1250	1546	880 cc

Fixed Dimensions (mm)

Parameter	Description	Value
A	Total width	125
B	Dimension B	110
C	Dimension C	80
D	Dimension D	230
E	Thread specification	M12
F	Air port thread	ZG3/8"

Dimensions by Boost Ratio (mm) & Oil Displacement (cc)

Ratio Code	Boost Ratio	G	H	I	J	Oil Disp.
L07	7.7:1	322.5	552	832	1025	120 cc
L16	16.6:1	407.5	679	1025	1267	206 cc
L20	20:1	449.5	749	1130	1397	340 cc
L25	25.4:1	507	845	1278	1580	595 cc
L28	28.4:1	540	900	1360	1682	732 cc
L36	36.4:1	596	993	1499	1854	972 cc
L41	41.1:1	623	1038	1567	1939	1234 cc

Fixed Dimensions (mm)

Parameter	Description	Value
A	Total width	160
B	Dimension B	140
C	Dimension C	100
D	Dimension D	270
E	Thread specification	M14
F	Air port thread	ZG1/2"

Dimensions by Boost Ratio (mm) & Oil Displacement (cc)

Ratio Code	Boost Ratio	G	H	I	J	Oil Disp.
L07	7.7:1	215	369	554	689	215 cc
L16	16.6:1	288	478	718	888	369 cc
L20	20:1	320	531	798	987	610 cc
L25	25.4:1	360	597	900	1113	1068 cc
L28	28.4:1	384	637	960	1187	1314 cc
L36	36.4:1	424	704	1060	1311	1740 cc
L41	41.1:1	443	735	1106	1369	2210 cc

Fixed Dimensions (mm)

Parameter	Description	Value
A	Total width	180
B	Dimension B	160
C	Dimension C	110
D	Dimension D	310
E	Thread specification	M16
F	Air port thread	ZG1/2"

Dimensions by Boost Ratio (mm) & Oil Displacement (cc)

Ratio Code	Boost Ratio	G	H	I	J	Oil Disp.
L07	7.7:1	217.5	371	645	801	217 cc
L16	16.6:1	327.5	536	834	1032	423 cc
L20	20:1	362.5	595	927	1147	699 cc
L25	25.4:1	407.5	669	1045	1293	1225 cc
L28	28.4:1	433.5	712	1112	1376	1507 cc
L36	36.4:1	478.5	786	1228	1520	1995 cc
L41	41.1:1	500	821	1280	1585	2535 cc

All dimensions in mm unless noted. Booster mounting hole positions — see engineering drawings. For non-standard ratios or custom strokes, contact our engineering team.

Matched Actuator

JRYG Matched Hydraulic Cylinder Dimensions

JRYG cylinders are flange-mounted hydraulic actuators paired with the JRH booster. Select bore and stroke based on your required output force, mounting space, and return force.

Parameter	Ø63 mm	Ø80 mm	Ø100 mm	Ø125 mm	Ø150 mm	Ø160 mm
Parameter	K Flange width mm	160	190	225	235	320	350
L Flange length mm	100	118	145	160	200	220
T Flange thickness mm	22	25	30	35	40	50
M Mounting hole spacing (M) mm	132	155	190	255	260	290
N Mounting hole spacing (N) mm	65	87	110	140	140	140
O Mounting hole diameter mm	14	17	22	25	32	40
V Cylinder tube OD mm	75	90	100	120	130	130
P Piston rod thread	M30×1.5	M30×1.5	M40×2	M48×2	M48×2	M56×2
W Port specification	ZG3/8"	ZG1/2"	ZG1/2"	ZG3/4"	ZG3/4"	ZG3/4"
return Return force @ 6 kgf/cm² kg	120	220	370	560	890	1000

Standard matched cylinder strokes: 5 / 10 / 20 / 30 mm. Custom strokes up to 400 mm available. Cylinder model code: JR-YG-{bore}-{stroke}-{quantity}.

Product Comparison

JRH vs JRA vs JRE

Three architectures for different machine layouts. All deliver high force from compressed air — the difference is how and where that force is applied.

This Product

JRH — Separated Pre-Press

Architecture	Separated booster + JRYG cylinders
Action	Pre-press two-stage (DT1 + DT2)
Booster Mount	Horizontal
Cylinder Mount	Any angle
Output Config	One-to-multiple
Boost Ratio	7.7:1 – 41.1:1
Bore Range	Ø63 – 180 mm

Best for:

Distributed / multi-point clamping
Limited space at work point
Brake & clutch systems
One booster driving multiple stations

JRA — Standard Pre-Press

Architecture	Integrated all-in-one
Action	Pre-press two-stage
Mounting	Vertical (rod down)
Output Config	Single output point
Force Range	1 – 40 tons
Bore Range	Ø63 – 180 mm
Power Stroke	5 – 50 mm

Best for:

Straight-down press-fitting
Punching, forming, riveting
Compact machine integration

View JRA →

JRE — Direct-Acting

Architecture	Integrated all-in-one
Action	Direct pressure (no pre-press)
Mounting	Vertical or horizontal
Output Config	Single output point
Force Range	1 – 13 tons
Bore Range	Ø50 – 125 mm
Speed	25 – 45 cycles/min

Best for:

Short-stroke, high-cycle tasks
Marking, embossing, staking
Simple single-valve control

View JRE →

Configure Online

Build Your Model Number

Select your bore, boost ratio, and matched cylinder configuration. The model code updates instantly — oil displacement is looked up automatically from the ratio × bore matrix.

Booster Model Code

JRH-80-L07-T30ml

Matched Cylinder Code

配 JR-YG-63-20-1

Air Cylinder Bore

Boost Ratio

High-Pressure Oil Output (per cycle)

Matched Cylinder Bore

Cylinder Stroke

Cylinder Qty

Configuration Summary

Selected Boost Ratio 7.7:1

System Oil Displacement (ref.) 70 cc

Matched Cylinders 1 × Ø63 mm / 20 mm stroke

Return Force per Cylinder 120 kg

Valve Configuration DT1 + DT2 (two 5/2 valves)

Booster Mounting Horizontal

Pre-press stroke and total stroke must be confirmed for final selection. Oil displacement shown is the system reference value from the bore × ratio matrix; high-pressure output per cycle depends on cylinder bore and power-stroke setting.

Request This Configuration

How to Select

JRH Selection Guide

Seven parameters define a complete JRH system. Have these ready when you contact our engineering team — or use the model builder above to generate your code.

Booster Air Cylinder Bore

Select from Ø80–180 mm based on required oil volume and available mounting space.

Boost Ratio or Air Stroke

Choose ratio code L07–L41 (7.7:1–41.1:1). Higher ratio = more force but more oil per cycle.

High-Pressure Oil Output

Specify T30 / T50 / T70 / T120 / T170 ml per cycle based on matched cylinder volume.

Pre-Press & Total Stroke

Define the fast approach (pre-press) stroke and total stroke — required for every JRH order.

Matched Cylinder Specs

JRYG cylinder bore (Ø63–125 mm std.), stroke (5–30 mm std.), and quantity (1–3+).

Return Force Requirement

Confirm the JRYG cylinder's return force (120–1000 kg at 6 kgf/cm²) is sufficient for die/mechanism reset.

Oil Lines & Synchronization

Specify oil line length, multi-cylinder synchronization tolerance, and available installation envelope.

Applications

Typical Applications

JRH excels where the force must be delivered away from the power source, or where multiple points need simultaneous high force.

Brake & Clutch Systems

Remote cylinders actuate calipers or clutches while the booster stays on the machine frame.

Bearing Press-Fitting

Controlled two-stage force for gentle approach then precise seating of bearings and bushings.

Hardware Assembly

Multi-point riveting, staking, and fastening of hardware fittings with synchronized cylinders.

Extrusion & Bending

High-force forming, bending, and extrusion where the actuator must follow the tool path.

Punching & Deburring

Clean, oil-mist-free operation for punching, trimming, and deburring in production lines.

Marking & Printing

Consistent impact force for part marking, pad printing, and embossing on automated lines.

Resources

Resources & Downloads

JRH Catalog Page (PDF)

Full specifications, dimensions, and selection tables from the printed catalog.

Request

Pneumatic Circuit Diagram (DWG/PDF)

Single-cylinder and multi-cylinder circuit drawings, including one-to-four configuration.

Request

3D Models & Engineering Drawings

STEP files and 2D engineering drawings for your selected bore and ratio configuration.

Request

Need Help Configuring Your JRH System?

Send us your workpiece force requirement, available space, and number of actuation points. Our engineering team will recommend the exact bore, ratio, and JRYG cylinder configuration — typically within one business day.

Request a Quote Talk to an Engineer