Morii-Seiiki NL1500, NL2000, NL2500, NL3000 User Manual

NLSERIES

Rigid & Precise

Rigid and Precise CNC Lathes

NLSERIES

NL1500/NL2000/NL2500/NL3000

2

Ever since our first machine tool rolled off the
production line in 1968, we here at Mori Seiki
have continued to make CNC lathes that are
praised by customers everywhere. Over those
35 years, we have released around 100 models.
We can say with confidence that we believe
every single one was an improvement on its
predecessor. Today, we are on the threshold of
a new beginning in the field of CNC lathes, and
we are determined once again to create a lathe
that will lead the industry in innovation. After
reworking our designs, and incorporating data
received from confronting heat related prob­lems and thousands of customer comments,
we have improved our products even more.
Our uncompromising development stance has
made it possible to deliver unprecedented
rigidity, precision, and reliability. Our efforts
have created our newest line, the NL Series.
These new machines are high-rigidity, high­precision CNC lathes and set the new standard
in “common sense” machining for a new age.

Rigid & Precise

MAPPS: Mori Advanced Programming Production System

●

Figures in inches were converted from metric measurements.

Wehavecreatedalathethatwill
changetheworld.

Turret with a built-in milling motor P.4−7

Turning performance/Rigidity P.8−11

Thermal isolation P.12−13

Machining power

P.14

−

15

Productivity P.16−17

Digital tailstock/Convenience P.18−19

Maintenance P.20−21

Automatic operation support P.22−23

Eco-friendly design P.24

Peripheral equipment P.25

MAPPSⅡ

P.26−27

Variation P.28−29

Package P.30

Installation drawing P.31−35

Standard & optional features P.36−37

NC unit specifications (MSX-850) P.38

Machine specifications P.39−43

Service support P.44

(a new high-performance operating system)

3

Rigid and Precise CNC Lathes

NLSERIES

NL1500/NL2000/NL2500/NL3000

4

5

Rigid & Precise

NLSERIES

Innovative
turret design

Turret with a built-in
milling motor

The milling mechanism on conventional lathes generates
a great deal of heat and vibration due to the large number
of parts involved, including the motor and gear belt. The
NL Series, however, features the industry's first turret
with a built-in milling motor. This revolutionary design
minimizes heat generation and vibration while eliminating
transmission losses. The new design increases both machin­ing accuracy and cutting performance.

The NL Series was designed to create a CNC lathe
with true milling capability. For example, the NL2500
can accommodate face mills of up to

φ

80 mm (φ3.1 in).
NL Series machines boast milling performance
approaching that of No. 40 taper machining centers.

φ

80mm

Face mill

NL2500

Tapping capacity

M20

《Actual size》

(φ3.1 in.)

Extremely rigid turret

In order to enhance the milling function, it is essential to increase
the rigidity of the rotary-tool holders. The NL Series rotary-tool
holders have a broader grip as compared to conventional lathes.
By raising attachment precision we have vastly improved rigidity.

■ Coupling diameter

Greater coupling diameter than before.

■ Super-rigid rotary-tool holders

Taking a hint from couplings, which
are praised for their high repeatability,
we developed a very rigid rotary-tool
holder.

NL2500

Tool diameter and depth of cut Tool diameter and depth of cut

10−15 mm
(0.4−0.6 in.)

φ

20 mm

(φ0.8 in.)

φ

20 mm

(φ0.8 in.)

20 mm
(0.8 in.)

Previous model NL2500NL2500

φ

210 mm

 (φ8.3 in.)

φ

250 mm

 (φ9.8 in.)

φ

210 mm

 (φ8.3 in.)

φ

250 mm

 (φ9.8 in.)

Coupling diameter

19 %

Greater

6

20mm

(0.8 in.)

Tool diameter＝Depth of cut

Rotary-tool holder rigidity

180 %

Greater

Previous model

■ Comparison of rotary-tool holder rigidity

Conventional lathes leave chatter marks when the depth of cut is made deeper, but with the NL Series,
it is now possible to cut to a depth equal to the tool diameter. This is attributed to the tool holders that have been designed to be more rigid.

NL2500YNL2500

A solid construction that can hold its own with the NL Series two-axis models.

DDS:Direct Drive Spindle

Y-axis specification construction

We also independently developed a powerful platform for maximizing performance in
the Y-axis specifications. This has achieved rigidity between the spindle and the tool
tip that exceeds that of conventional two-axis lathes.

■ High-performance rotary tool spindle

A DDS motor that has no gear belt is used for the rotary tool
spindle, delivering high-speed, high-efficiency machining.

NLSERIES

Max. rotary tool spindle speed

NL1500/NL2000/NL2500

I

50

mm

(I2.0 in.)

6,000

min

-1

4,000

min

-1

NL3000

I

60

mm

(I2.4 in.)

Y-axis travel (Y-type)

Previous model

NL2500

Rotary tool spindle acceleration time

0→4,000 min

-1

0→4,000 min

-1

0.11

sec.

0.35

sec.

Previous model

Maximum rotary tool spindle torque

Rigid & Precise

NLSERIES

7

0→6,000 min

-1

0.23

sec.

NL1500

24

N·m (17.7 ft·lbf)

<3 min>

NL2000

29

N·m (21.4 ft·lbf)

<3 min>

40

N·m (29.5 ft·lbf)

<3 min>

NL2500
NL3000

50

%

Greater

Reduced
approximately

70

%

8

The ultimate
in turning

Our goal was to minimize tool tip vibration, thus reducing the need
to grind after cutting as well as extending tool life. The NL Series
achieves this with its increased rigidity between the spindle and
tool tip.

Improved tool tip rigidity

9

Rigid & Precise

NLSERIES

Handles large-diameter
workpieces

Although the NL Series machines remain rock solid during
heavy-duty cutting, their design incorporates the largest
spindle through hole in its class <φ91 mm (φ3.6 in.) for
NL2500>.

91mm

(3.6 in.)

Through spindle
hole diameter

NL1500

Through spindle hole diameter (headstock 1 spindle)

61

mm

(2.4 in.)

NL2500

91

mm

(3.6 in.)

NL2000

NL2500

73

mm

(2.9 in.)

NL3000

105

mm

(4.1 in.)

■

End face finishing
accuracy

SL-253BMC

Patterns caused by large
vibration during machining

Thanks to high rigidity, machining no longer
requires additional grinding.

Increasing the rigidity between the spindle and the tool tip has made it possible to achieve high quality machined
surfaces through turning alone.

NL2500

Conventional machines create a pattern on material
due to the amount of vibration the tool tip generates.
With the NL Series, there is no pattern on the material,
thus eliminating the need for grinding.

■ Roundness

(turning)

Filter: 1−50

10 μm

90°

270°

180° 0°

0.4

μ

m

Tool

Material
Outer diameter
Spindle speed
Feedrate

Diamond tool

<Nose radius 0.5 mm (0.020 in.)>

Brass

40 mm (1.6 in.)

4,000 min

-1

0.05 mm/rev (0.0020 ipr)

Machine type

NL2500MC/

700

Tool
Inserts
Material <JIS>
Cutting speed
Feedrate
Depth of cut

WTKNR2525M-16N

TNMG160408-PF (4015)

S45C

＊

<A 150×150 mm (A 5.9×5.9 in.)>

380 m/min (1,246.8 fpm)

0.12 mm/rev (0.005 ipr)

0.1 mm (0.004 in.)

●

See Automatic Operation Support (p23) for details on bar work capacity.

Patterns caused by small
vibration during machining

＊ Carbon steel
JIS: Japanese Industrial Standard

●

The cutting test results indicated in this catalog are provides as an example. The results indicated in this catalog
may not be obtained due to differences in cutting conditions and environmental conditions during measurement.

NL2500

Previous model A

Previous model B

Ultra-high rigidity structure

We have a new design for the basic structure: the spindle, saddle and tailstock.
This new design ensures consistent rigidity. The result is a level of rigidity that
has not been seen before, with increased stability due to the broad bottom face.

10

■ Broader guideways

The slideways are 30 % wider than those of conventional machines
and are the largest in the class. We have achieved an unknown level
of stability not only in turning work but also in milling work.

Guideway
width

Torsionally
rigid

100

%

Greater

<comparison to conventional machines>

NL2500Y/

700

Previous model

■

Bed torsion rigidity

NL2500

Dramatically better bed torsion rigidity compared to conventional machines has been achieved through static analysis.

Torsionally rigid

100 %

Greater

Top rail

Bottom rail

Torsion displacement graph

30%

Greater

30

%

Greater

<comparison to conventional machines>

<comparison to conventional machines>

2
0

-2

-4

-6

-8

-10

-12

Displacement (μm)

-14

-16

-18

-2,000 -1,800 -1,600 -1,400 -1,200 -1,000 -800 -600 -400 -200 0

Distance along rail (mm)

NL2500

Previous model

Top rail

Top rail

Bottom rail

Bottom rail

Highly rigid spindle

The axis rigidity of the headstock and its mounting have been
improved by changing the shape of the headstock and
increasing the thickness of its parts. The diameter of the
bearings has been increased. This allows better spindle rigidity
while enlarging the through-hole diameter.

Rigid & Precise

NLSERIES

Axis rigidity

20 %

Greater

Headstock attachment rigidity

30 %

Greater

Rigidityofthespindleitself

NL2500

Acceleration/deceleration time

＊

Spindle acceleration time
(0→4,000 min

-1

)

Spindle acceleration time
(0→4,000 min-1)

Spindle deceleration time
(4,000→0 min

-1

)

3.4

sec.

4.9

sec.

Spindle deceleration time
(4,000→0 min

-1

)

4.2

sec.

Previous model

3.6

sec.

NL1500

Maximum spindle torque (standard)

200 N·m (147.5 ft·lbf) <50 %ED>

NL2000

349 N·m (257.4 ft·lbf) <50 %ED>

NL2500

599 N·m (441.8 ft·lbf) <25 %ED>

NL3000

1,025

N·m

(756.0 ft·lbf)

<30 min>

NLSERIES

Maximum headstock 2 spindle torque

77.8

N·m

(57.4

ft·lbf)

<25 %ED>

The No. 2 spindle also delivers powerful turning.

■

Improved acceleration/deceleration time and torque specs

■

Headstock 2 spindle
(S-, SMC-, SY-types)

Raising the rigidity has endowed the NL Series with performance equal to that of spindle motors one class above.

11

50

%

Greater

Reduced
approximately

31

%

Reduced
approximately

14

%

＊

When mounted with chuck

<comparison to conventional machines>

12

■ Heat elimination layout

NLSERIES

Previous model

It is common to find the oil cooler – a major source of heat – located right
next to the spindle in conventional machines. As a result, the headstock
is affected adversely by that heat.

Placing the oil cooler behind the machine removes that heat source
from the headstock. The machine is designed so that the exhaust from
the oil cooler doesn’t come in direct contact with the machine.

Large heat
displacement

Low heat
displacement

Oil cooler

Oil cooler

■ Fully-covered bed

Covering the bed with a cover makes it difficult for the heat from chips to be
transmitted to the bed.

Oil cooler exhaust vent

The oil cooler’s exhaust heat is blown out of
the cover in the direction of the machine’s side.

Displacement (mm)

-0.003

-0.005

-0.007

-0.009

-0.011

-0.013

-0.015

-0.001

0.001

0.003

Time (hour)

01234567 98

Oil cooler/Rear side, exhaust blocked (X-axis tip)

Oil cooler/Left side surface layout (X-axis tip)

Oil cooler/Rear side, exhaust blocked (X-axis base)

Oil cooler/Left side surface layout (X-axis base)

3.1

μm

12.7

μm

NL2500

Previous model

Spindle thermal displacement

Thermal
isolation

The most prominent feature of the NL Series is said to be the
elimination of the adverse effects of heat. In order to raise
the continuous machining precision of lathes, 95 % of which
is said to be taken up by cutting time, we at Mori Seiki have
come up with the concept of total heat elimination.

Designed to
eliminate all heat

Spindle Cooling

We have redesigned the spindle, which is
the greatest source of heat, to employ a
uniform-heat construction that maintains an
equal temperature all around the spindle.
The main spindle unit is protected from rises
in temperature by the spiraling oil jacket
located all the way to the back side.

Rigid & Precise

NLSERIES

13

Milling turret with a heat-suppressing design

The industry’s first turret with a built-in milling motor minimizes heat.

Ball screw shaft cooling

＊

(option)

Shaft cooling is used on ball screws to control heat during feed.

Inverter-controlled oil cooler

An inverter-controlled oil cooler with
very accurate temperature regulation
has been used.

Motor

Timing belt 1

Timing belt 2

Bevel gear

Keyed shaft

+

+

+

Involuted spline

+

+

Built-in milling motor

Keyed shaft

+

1/10

Rising turret
temperatures

Previous model

NLSERIES

NLSERIES

Internal design of the turret

The transmission with all its gear, belts,
and more, generates a substantial amount
of heat and can adversely affect machining
precision.

The built-in milling motor design has
eliminated the transmission mechanism.
Therefore, sources of heat are eliminated
and jacket cooling is performed. This is
only achieved with a built-in milling
motor.

＊

X-axis only.

Oil jacket

or less

Built-in milling motor

Oil jacket

14

Machining power

Rigid & Precise

NLSERIES

By employing a super-rigid construction for the NL Series and
equipping it with a turret with a built-in milling motor, it is
able to deliver cutting equal to that of machines one class
above. This contributes to productivity.

Machine type
Material <JIS>
Spindle speed
Depth of cut
Cutting speed
Feedrate

Heavy-duty cutting <O.D.> Throw-away drill

NL2500MC/700
S45C

＊

764 min

-1

10 mm (0.4 in.)
120 m/min (393.7 fpm)

0.4 mm/rev (0.016 ipr)

Machining rate per minute

576.0 mL/min

(35.1 in

3

./min)

As you can see, wide cutting can
be done in outer diameter heavy
cutting.

Machine type
Material <JIS>
Spindle speed
Drill diameter
Cutting speed
Feedrate

Milling capacity

(material <JIS>：S45C＊)

NL2500MC/

700

S45C

＊

549 min

-1

58 mm (2.3 in.)
100 m/min (328.1 fpm)

0.3 mm/rev (0.012 in.)

《Actual size》

Turning performance

Machining rate per minute

435.2

mL/min

(26.5

in

3

./min)

End mill

<B 20 mm (B 0.8 in.) High speed steel>

Drill

<B 23 mm (B 0.9 in.) High speed steel>

Tap

Machining rate per minute

25.6 mL/min (1.6 in

3

./min)

Machine type
Rotary tool spindle speed
Depth of cut
Cutting speed
Feedrate

NL2500MC/

700

320 min

-1

20 mm (0.8 in.)
20 m/min (65.6 fpm)
64 mm/min (2.5 ipm)

Machining rate per minute

43.0 mL/min (2.6 in

3

./min)

Tool

M20

×P

2.5

Machine type
Rotary tool spindle speed
Cutting speed
Feedrate

NL2500MC/

700

345 min

-1

25 m/min (82.0 fpm)

103.5 mm/min (4.1 ipm)

Machine type
Rotary tool spindle speed
Cutting speed
Feedrate

NL2500MC/

700

160 min

-1

10 m/min (32.8 fpm)
400 mm/min (15.7 ipm)

JIS: Japanese Industrial Standard ＊Carbon steel

●

The cutting test results indicated in this catalog are provides as an example. The results indicated in this catalog may not be obtained due to differences in cutting conditions and environmental conditions during measurement.

A58mm(58mm(A2.3in.2.3in.)A 58 mm (A 2.3 in.)

20 mm (0.8 in.)

20 mm (0.8 in.)

A 23 mm (A 0.9 in.)