SUPER ENERGY-SAVING SMALL UNIT – SMALLPAC（SP*A）
This compact hydraulic unit has a circuit configuration designed to stop the motor according
to the clamping pressure of workpiece detected by a pressure switch.
The pressure is held by a pilot-operated check valve.
This unit is the most suitable as a jig clamp for small size machining centers.

■Features

1. Drastic energy-saving effectPower consumption of intermittent motor operations is reduced drastically.
2. Super compact size
A super compact unit so small that it can be installed next to a clamp device is realized, byreducing the size of motor, tank, etc. and integrating the pump motor and the solenoid
valve by the manifold.
3. Exempted from the regulations on high efficiency motor
This unit is exempted from the regulations on high efficiency motor in many countries,
thanks to the adoption of short-time rated motors. (According to our research, as of May
2016)■Description of the model designation

SP3AｰANAGAGｰABWｰ01
Smallpac

Model No.

No. of station of manifold
1 to 3: 1 to 3 station

3rd station pressure switch control port
N: No pressure switch installed (only for Z circuit)
A: A port B: B port W: A · B port

Series
A: Motor 0.75 kW
Pump 4 cm3/rev
Tank 1.4 L

2nd station pressure switch control port
N: No pressure switch installed (only for Z circuit)
A: A port B: B port W: A · B port

* 1st station control device(In the table below)

1st station pressure switch control port
N: No pressure switch installed (only for Z circuit)
A: A port B: B port W: A · B port

* With/without 1st station pressure reducing valve
G: With reducing valve N: No pressure reducingvalve installed* With/without 3rd station reducing valve
G: With pressure reducing valve N: No pressure reducing valve installed* 2nd station control device(In the table below)* 3rd station control device(In the table below)* With/without 2nd station pressure reducing valve
G: With reducing valve N: No pressure reducing valve installed* In the order of 1st, 2nd and 3rd stations
from the motor side

■Type of installed valve
Type code

Control device (V)HD1N-3W-BGA-025-A1（AC100V）

ACD○

Terminal box type○

Blank plate

HMS-CA-HD3-025

4-pin connector type (right side pickup/-common)
○○K○○

○

4-pin connector type (right side pickup/+common)○○

Pilot check valve○* Types not listed above are available. Please consult separately.

K−29

HYDRAULIC POWER UNITS

HG3H-P-D4-025B

RemarkTerminal box typeHD1N-3W-BGA-025-D2A（DC24V）
HK3H-W-Y2-025B

Z○

HD1N-3W-BGA-025-D2C（DC24V）

Reducing valve

G

Terminal box typeHD1N-3W-BGA-025-D2（DC24V）

Pilot check valve

E○HD1N-3W-BGA-025-A2（AC200V）
Solenoid valve

B■Specifications■Pressure-flow rate characteristics

Motor
0.75 kW, 4-pole, 3P

Motor voltage

AC200V

AC200V

AC220V

Frequency

50Hz60Hz60Hz

Rated current value

4.2A

3.7A

3.6A

RatingShort-time (S2) Continuous operation 10 sec or lessDuty ratio

10% or lessLegal regulations

Compliant to CE Marking

Installation environment

Ambient temperature 5 to 35˚C RH less than 95%

Flow rate

Motor capacity

Pressurepressure:( Relief
When set at 7MPa )* Current value at 7 MPa is approximately 120% of rated current value.

Max. operating pressure7 MPa (For higher than 7 MPa, please consult.)

Pump displacement

4cm3/rev

A/B port outlet

G3/8 (O-ring seal)

Tank capacity

1.4 L (Effective fluid quantity: 0.3 L)

Recommended
R&O, wear-resistant hydraulic fluid, equivalent to ISO VG32
hydraulic fluid
Fluid temperature range
5 to 60˚C (20 to 150mm2/s)(Recommended viscosity)

Fluid cleanliness■Pressure switch circuit
Operation LED
Power supply⊕ (Red)Pressure

Pump

Main circuit

Output ⊕ (White)
Output ⊖ (Green)

SensorBetter than NAS1683 Class 12
Common (Black)Pressure switch
DC12-24V±10％15mANo. of output points

1Output method

Open collector output, insulated by photo-coupler

Pressure adjustment range

1 to 7MPa

Hysteresis

1MPa

Switch capacity

DC35V 100mA

Model

PS86-104P-HR2 (Maker: Copal Electronics)

Clamping pressure varies because of the motor ON/OFF control
by the pressure switch.

(MPa)
4
Pressure

Drive power supply
Power consumption

32
10

Example of clam holding
OFFOFFON

P1
P2P (Pressure switch
upper limit value)
P (Pressure switch
lower limit value)

TimeK
Please read the Operating Manual
carefully to ensure correct usage.

● Control the fluid in the tank at the center of the oil level gauge when thecylinder is contracted to the end.
● Oil level in the tank drops during test run after piping work since thehydraulic oil flows into the circuit. Test run while supplying the fluid not todrop the oil level.
● Use the phases L1 (R)-U, L2 (S)-V and L3 (T)-W at the power supply sideand motor side. Run and stop alternately during test run and confirm thatthe pressure rises on the pressure gauge provided at the discharge side. If itdoesn’t, check the direction of rotation of motor.
● Bleed air.
● Always ground the hydraulic power unit. Failure to ground it will cause
electric shock or fire. You are recommended to install an earth leakage
breaker to prevent electric shock accident and fire with certainty.
● Relief valve pressure is set at 2.0 MPa by the factory shipment.
Please read the Operating Manual
carefully to ensure correct usage.
● Use general mineral oil base hydraulic fluid equivalent to ISO VG32 within
the specified fluid temperature range 5 to 60˚C. Fire-resistant fluid cannot
be used.
● Use hydraulic devices within the ambient temperature range 5 to 35˚C andless than RH 95%.
● Avoid installing at vibrating or oscillating sections. Direction of installation isvertical only.
● Use operation patterns at the duty ration 10% or less.
Operation time
Duty ratio*=× 100% ≦ 10%
Operation time + Stop time

Cautions on use* Duty ratio is the ratio of the operation time relative to the operation time and the stop time.

K−30● Use in operating conditions that the oil temperature is no higher than 60˚C.
Oil temperaturerise value

HYDRAULIC POWER UNITS

Precautions at starting

When set at 7 MPa
When set at 5 MPa
Conditions: 5 sec ON(cylinder operation 1 sec)
45 sec OFFDuty ratio

NOTE:
Oil temperature =Room temperature +Temperature rise value● Motor temperature must be no higher than 80˚C. The temperature will rise if
the duty ratio becomes 10% or higher.
● When the motor has operated for more than 10 sec, the motor must bestopped by detecting error.
● Since a thermal protector is incorporated in the motor, connect its wires.
When the thermal protector trips, the machine must be stopped bydetecting error. Since the thermal protector is reset automatically if thetemperature drops, an electric circuit must be provided so that operation
cannot be restarted unless the error detection is reset.
● You are recommended to use an electromagnetic switch of 1 rank higher.
Example: Select an electromagnetic switch of 0.7 kW → 1.5 kW.
● Setting pressure of the pressure switch must be no higher than 7 MPa.
● For pressure setting methods of the pressure switch and the pressure reducingvalve, refer to the instruction manual.

■Outside dimensions
SP1A (1)Relief valve pressureadjustment screw

M8 eyebolt holePressure gauge

Mounting dimensions (bracket dimension)

5014

φ14200

230

25200
230

R715

Bracket200325

Oil filler port-and-air breather

Oil level gauge

A port cable outlet G3/8
Nameplate148

12

Cable hole φ2250

325

M8 eyebolt hole

Tank installation/reoval dimension (425)

A port pressure switch(B port at opposite side)
2-G3/8B port cable outlet G3/8

Mass: 18 kgConditions: No valve installed(main unit only)(380)

SP2A (2)Relief valve pressureadjustment screw

M8 eyebolt holePressure gauge

Mounting dimensions (bracket dimension)

K25(380)

200

200
230

R715Bracket
250
Cable hole φ2212250

340

Oil filler port-and-air
breather

50

340
Tank installation/reoval dimension (440)

A port pressure switch(B port at opposite side)
4-G3/8Oil level gauge
A port cable outlet
2-G3/8
Nameplate

B port cable outlet
2-G3/8(380)148

M8 eyebolt hole

Mass: 19 kg
Conditions: No valve installed(main unit only)

K−31

HYDRAULIC POWER UNITS

230

5014φ14■Outside dimensions
SP3A (3)Relief valve pressureadjustment screw

M8 eyebolt holePressure gauge

Mounting dimensions (bracket dimension)

200
230

25200

230

50

14

φ14

R715

BracketA port pressure switch(B port at opposite side)
6-G3/8M8 eyebolt hole

300

300

50

340

Oil filler port-and-air
breather

Oil level gauge
148

12

Tank installation/reoval dimension (440)340

Cable hole φ22

A port cable outlet
3-G3/8Nameplate■Hydraulic circuit (example)
No.

KName

No.

Name

HYDRAULIC POWER UNITS① Pump⑧ Pressure gauge② Motor⑨ Pressure switch③ Relief valve⑩ Oil filler port-and-air breather④ Manifold⑪ Oil level gauge⑤ Pilot check valve⑫ Strainer⑥ Reducing valve⑬ Reservoir⑦ Solenoid valve

K−32

B port cable outlet
3-G3/8(380)Mass: 20 kg
Conditions: No valve installed(main unit only)