Li-0025
NITTO KOHKI CO., LTD.
Head Office9-4, Nakaikegami 2-Chome, Ohta-ku,
Tokyo 146-8555 Japan
TEL: +81-3-3755-1111
FAX: +81-3-3753-8791
E-mail: overseas@nitto-kohki.co.jp
www.nitto-kohki.co.jp

To: Our Valued Distributors

June 30, 2021

New product: Cutting oil collecting unit Model HK-400A

We are pleased to inform you that the new Cutting oil collecting unit, Model HK-400A
has been released.
The previous model HK-400 was for water-soluble cutting oils only, but the newHK-400A is also compatible with oil-based cutting oils. (Note: Not all oil-based cutting
oils can be used. Please refer to the characteristics diagram and conversion formula in
the catalog to confirm whether the product can be used or not.)The main features are as follows:[Features]
1. Easy installation
Install on the side of machine tools with the magnet.
2. Comes with a dedicated strainer
Prevents suction of cutting chips.
3. Capable of suction of gas & liquid mixture
No worry of motor burns even when idling.
4. No air piping required
Save energy by switching from process pumps and vacuum ejectors.
For further information, please see our catalog No. L02en.
The HK-400 is discontinued to be switched to the successor model HK-400A.
Your immediate introduction into your market would be highly appreciated.

1 / 1L02en

Cutting oil collecting unit

Cutting oil collecting unit Model HK-400A

Improve the environment around
Machine Tools with HK-400A

Compatible with both oil-based cutting oils and water-soluble cutting oils
*For details, carefully read "Cutting oil collecting capability" and "Precautions for use" in this catalog before use.

Main Body

Install on the side of machines with a magnet.
No air piping required. Save energy byswitching from vacuum ejectors.
Comes with a strainer to prevent suction ofcutting chips.
Capable of suction of gas & liquid mixture,
no worry of motor burns even when idling.
24 V DC driven.

Installation
with a magnet

The HK-400A collects small
amounts of cutting oil thatspill from machine tools.

Installation example

Strainer Unit

Proposal for improvement 1

Proposal for improvement 2

Save labor and power by
eliminating collection jobs
using shovels and cloth.

Downsize by switchingfrom air vacuum cleaners.

Advantage

Advantage

Eliminate unnecessary jobs such as
using shovels or cloth by using HK-400A.
Collects cutting oils automatically by justinstalling HK-400A.
The cutting chips are separated.

HK-400A

Also saves space byswitching to HK-400A.

HK-400A

Proposal for improvement 3Machine
tool

Save energy by switching fromprocess pumps and ejectors.

IN

Advantage

SuctionNo compressed air is required.

Discharge

Main
BodyMax.

approx. 10 m

OUT

*HoseMax.

approx. 4 m

Oil tank*HoseStrainerUnit*Hose is not included.

Recommended hose: Silicone hose ø3 mm×ø9 mm

Oil panInstallation examples

Main
Body

Before actual use, read the instruction manual and install the productunder the guidance of a chief electrical engineer.

Hose

Control panel
24 V DC
Output terminal

Timer
Control box

24 V DC

Oil tank

OUT

Hose

24 V DCIN

1

When adjusting the operatingtime using a timer.

StrainerUnit
Oil panWhen connecting with a direct current (DC) power
supply and operating with an ON/OFF switch.
Main
Body

IN

Main
Body

AC/DCConverter
Oil tank

OUT

24 V DCIN

Oil tank

OUT

Hose

Hose

24 V DCWhen connecting with an alternating current (AC)power supply and operating with an ON/OFF switch.

115/230 V AC
HoseControl panel
24 V DC
Output terminal

3Hose2

StrainerUnit

Strainer
Unit
Oil panOil panCutting oil collecting unit

HK-400A

Cutting oil collecting capability*Refer to the characteristic diagram and conversion formula below and consider whether the product can be used or not.

Flow rate [mL/min]

power... 24 V DC Brown wire: +24 V Blue wire: GND
Viscosity vs. Flow Rate Characteristics •• Input
Piping conditions... Silicone hose Inner diameter: ø3 mm, length: 4 m No lifting load

400[cfm] [gallon/min]
0.01410.106

300

0.01060.079

200

0.0071

0.053

1000.0035

0.026

01234 5 68 10203050 70 100

200

Viscosity [mPa•s]
Kinematicviscosity[cSt] [mm2/s](40˚C)

Viscosity[mPa•s](24±1˚C)

Flow rate[mL/min](24±1˚C)

Water-

1.9400Sample A

7.0

9.4

145

Sample B

15.0

21.9

74

Sample C

32.5

56.8

27

Liquidtype

Maintenance
Procedures

Viscosity conversion formula
Viscosity [mPa•s] = Kinematic viscosity [mm2/s] × Density [g/cm3](Kinematic viscosity: 1 mm2/s = 1 cSt Viscosity: 1 mPa•s = 1 cP)• Viscosity is measured with the digital viscometer VISCO Low Viscosity Sample Adapter (ULA)
manufactured by Atago Co., Ltd.
• Refer to the above formula for conversion from kinematic viscosity to viscosity. For thekinematic viscosity and density of the cutting oil used, contact the cutting oil manufacturer.
• Characteristic diagrams are for reference only and are not guaranteed values.
• The above performance may not be attained depending on the operating conditions (operatingenvironment, liquid type, piping material). Especially when using water-insoluble cutting oil,the fluid viscosity fluctuates significantly depending on the temperature change, so pleasejudge whether the pump can be used or not under actual operating conditions.

Turn off the power of the HK-400A Main Body
Disassemble the Strainer Unit
Clean the Filter Unit and Wire Mesh
Clean the inside of the Strainer with a brush
Reassemble the Strainer Unit

Image of chips

MainBody
Inline Filter

Reference data
For cutting chips (0.1 mm or greater)

Strainer
Filter Unit

About once a week

Wire Mesh
Circuit Breaker(Power switch)

Inline Filter
replacementtiming (guideline)

Filter CoverDisassemble

When the wire mesh inside is dirty

StrainerUnit

Filter cleaning
timing(guideline)
For sludge (mud water)*Maintenance cycle differs depending on the viscosity of the oil and size of the chips.

More than once a day(because particles are fine and easily clogged)Components

Pump

Inline Filterø90 mmMain Body

118m

68 mm

81 mm

119mm

HK-400A

Strainer Unit

Circuit Breaker Boxm

Power Cable

List of replacement parts (*replacement parts and optional parts are the same as HK-400 except for the Circuit Breaker Box)
Part Name

Part No.

Pump Unit

LB09133

Filter Unit

LB09141

Power Cable (5 m)

LB09140

Part Name

Part No.

Part Name

Part No.

[Components]
Strainer, Filter Unit, Screw
Wire Mesh, Filter Cover

LB09134

Circuit Breaker Box

LB09608

Inline Filter

LB09137

Wire Mesh

LB09138

Strainer Unit

Filter Cover

LB09139[Components]
Filter Cover, Screw

Optional accessory
Part Name

Silicone Hose(ø3×ø9×4000 mm)

Part No.
LB09135

Specification

Precautions for use

Rated voltage

24 V DC

Maximum current (*1, Operating pressure range, Fluid: Water 25°C)

450 mA

Flow rate (*1, *3, *4, open discharge (0 kPa), Fluid: Water 25°C)

400 mL/min

Operating pressure range (*1, *2, Fluid: Water 25°C)

0 to 100 kPa

Self-priming pressure (*1, *3, Fluid: Air 20°C)

40 kPaDuty cycle (Fluid: Water 25°C)
Rated performance (*5)

Continuous
6000 hours (MTTF)

Circuit breaker rated current

1A

Circuit Breaker Box protection grade

IP65

Applicable fluid
Recommended fluid viscosity (*4, *6)

Cutting oil (water-soluble and water-insoluble)
30 mPa•s or lessPlace of use
External dimensions
WeightMain Body (Pump Unit, Circuit Breaker Box)

0.6 kgPower Cable

0.3 kgStrainer Unit

0.3 kgNITTO KOHKI CO., LTD.
WebIndoors
119 mm (L)×118 mm (W)×81 mm (H)www.nitto-kohki.co.jp/e/*1: Conditions are for rated voltage, cool unit, and initial operation.
*2: The product cannot be restarted from the closed pressure state orused beyond the working pressure range.
*3: When the fluid reaches a low temperature, the check valve hardens
and the flow rate and self-suction power will decrease.
*4: When highly viscous cutting oil (2 mPa•s or more) is collected, theflow rate decreases. Especially when using with water-insoluble
cutting oil, the fluid viscosity fluctuates significantly according totemperature change, so check whether the pump can be used under
actual operating conditions.
*5: Rated performance (MTTF: Mean Time to Failure) is the mean valueof the accumulated operating time at the rated voltage, open
discharge (0 kPa) and water temperature of 25°C and when the flowrate becomes 80% (320 mL/min) or less of the specified value.
The rated performance varies depending on the operating conditions(operating pressure, operating fluid temperature, operating fluidviscosity, operating environment, etc.).
*6: Refer to the following formula for conversion from kinematic viscosity[mm2/s] to viscosity [mPa•s].
Viscosity [mPa•s] = Kinematic viscosity [mm 2/s] × Density [g/cm 3](Kinematic viscosity: 1 mm 2/s = 1 cSt Viscosity: 1 mPa•s=1 cP)

Head Office9-4, Nakaikegami 2-chome, Ohta-ku, Tokyo 146-8555, Japan
Tel : +81-3-3755-1111
Fax : +81-3-3753-8791
E-mail : overseas@nitto-kohki.co.jp

ISO9001

JQA-2025

ISO14001
ISO 9001
ISO 14001

JQA-EM4057
H.Q./R&D Lab

DISTRIBUTED BY

Specifications and designs are subject to change at any time without notice.
The contents of this catalog are current as of July 2021.

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