Benefits
ENG_96695.XML
The performance features of the two-speed gearbox for SIMOTICS M-1PH8 asynchronous motors are as follows:
- Drive power up to 100 kW (134 hp)
- Constant power range at drive shaft up to 1:24
- Suitable for both directions of rotation
- Motor shaft heights SH 100 to SH 225
- Types IM B35 and IM V15 (IM V35 available on request)
The following advantages are gained by mounting the gearbox outside the spindle box:
- Easy adaptation to the machine tool
- Low noise and no temperature fluctuations due to gearing inside the headstock
- Separate lubrication systems for the main spindle (grease) and the change-speed gearbox (oil)
- Gear efficiency > 95 %
- The drive power can also be transferred from the gearbox output via a gear wheel (on request) or coaxially via a flexible coupling rather than by a V-belt.
Application
ENG_96691.XML
Gearboxes increase the drive torque at low motor speeds and extend the range of constant power that the main spindle motor can deliver. The full cutting capacity of modern machine tools can therefore be utilized throughout the entire speed range.
Design
ENG_96689.XML
The two-speed gearboxes have a planetary design. The power is distributed among several planet wheels from the central sun gear. Thanks to this gearing design, the gearboxes are extremely compact. The gear-changing device, a splined sleeve that moves axially, is of form-fit design.
Position 1: Gear ratio i1 = 4
Position 2: Gear ratio i2 = 1
The motor is flanged onto the gearbox by an adapter plate. The three-phase motor must be suitably prepared for gearbox mounting.
With shaft height SH 160 and above, motors in frame sizes IM B35 and IM V15 must be supported at the NDE to eliminate any mechanical stress.
Any transverse force imported into the gearbox has to be borne by the gearbox and transmitted to the machine base.
The motors for all 2K gearboxes must be full-key balanced with a feather key. The 2K 120, 2K 250, 2K 300, 2K 450 gearboxes are sealed so that the motor flange is also adequately sealed in the standard version.
Vertical mounting positions IM V15 and IM V35 require circulating lubrication of the gearboxes.
The standard version of the change-speed gearboxes up to and including the 2K 300 has a maximum circumferential backlash of 30 angular minutes (measured at the gear output). Several special versions suitable for milling or machining with cut interruption can be supplied on request:
- Reduced backlash with special features: max. 20'
- Reduced backlash for high performance: max. 15'
P_DA65_XX_00065
Profile of a planetary gearbox
The power unit (motor and gearbox) is supplied with vibration magnitude grade R in accordance with EN 60034-14 (IEC 60034-14). This is also the case when the motor is ordered with vibration magnitude grade S.
The belt pulley1) must be a cup wheel type pulley. For mounting the pulley, the output shaft on the gearbox has a flange with an external centering spigot and tapped holes. for easy fitting and removal of the pulley.
1) Not included in scope of supply.
Technical specifications
ENG_96690.XML
Motor 1PH8
|
Gearbox
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Shaft height
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ZF identifier
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Type
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Speed, max.1)
|
Rated torque, permissible (S1 duty)
|
Maximum torque, permissible (S6-60 % duty)
|
Moment of inertia Gearbox
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Weight Gearbox, approx.
|
SH
|
|
|
Drive
|
Drive
|
Outuput
i = 1
|
Outuput
i = 4
|
Drive
|
Outuput
i = 1
|
Outuput
i = 4
|
Outuput
i = 1
|
Outuput
i = 4
|
|
|
|
|
n
max
|
M
|
M
|
M
|
M
|
M
|
M
|
J
|
J
|
m
|
|
|
|
r/min
|
Nm (lbf-ft)
|
Nm (lbf-ft)
|
Nm (lbf-ft)
|
Nm (lbf-ft)
|
Nm (lbf-ft)
|
Nm (lbf-ft)
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kgm2 (lbf-in-s2)
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kgm2 (lbf-in-s2)
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kg (lb)
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100
|
2K 120
|
2LG4312-...
|
8000
|
120 (88.5)
|
120 (88.5)
|
480 (354)
|
140 (103)
|
140 (103)
|
560 (413)
|
0.0110 (0.10)
|
0.0114 (0.10)
|
42 (93)
|
132
|
2K 250
|
2LG4315-...
|
6300
|
250 (184)
|
250 (184)
|
1000 (738)
|
400 (295)
|
400 (295)
|
1600 (1180)
|
0.0270 (0.24)
|
0.0570 (0.50)
|
68 (150)
|
160
|
2K 300
|
2LG4320-...
|
6300
|
300 (221)
|
300 (221)
|
1200 (885)
|
400 (295)
|
400 (295)
|
1600 (1180)
|
0.0270 (0.24)
|
0.0570 (0.50)
|
86 (190)
|
160
|
2K 450
|
2LG4330-...
|
5000
|
450 (332)
|
450 (332)
|
1800 (1328)
|
630 (465)
|
630 (465)
|
630 (465)
|
not specified
|
not specified
|
155 (342)
|
180
|
2K 800
|
2LG4250-...
|
5000
|
800 (590)
|
800 (590)
|
3200 (2360)
|
900 (664)
|
900 (664)
|
3600 (2655)
|
0.1956 (1.73)
|
0.1766 (1.56)
|
175 (386)
|
180
|
2K 801
|
2LG4260-...
|
5000
|
800 (590)
|
800 (590)
|
3200 (2360)
|
900 (664)
|
900 (664)
|
3600 (2655)
|
0.1956 (1.73)
|
0.1766 (1.56)
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175 (386)
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225
|
2K 802
|
2LG4270-...
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On request
|
For further binding technical specifications and configuring aid (e.g. lubrication, temperature rise and typical applications), please refer to the latest catalog supplied by ZF (Zahnradfabrik Friedrichshafen). The permissible characteristics of the motor and gearbox are a governing factor in the design of the complete drive unit (motor and gearbox).
For further information, refer to: https://support.industry.siemens.com/cs/ww/en/view/98710138
With motor SIMOTICS M-1PH8166-1..2, for example, the rated torque must be reduced to 300 Nm (221 lbƒ-ft). With motors of shaft height SH 132, please note that the maximum permissible speed of the 2K 250 gearbox for splash lubrication is 6300 r/min.
Option K90 with motor shaft diameter 42 mm (1.65 in) is also required for the 2K 250 gearbox.
Selection and ordering data
Type of construction for complete unit
|
Output flange dimension D2
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Two-speed gearbox (standard version)2)
Gear stage i1 = 4
|
|
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mm (in)
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Article No.
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ZF identifier
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For SIMOTICS M-1PH810.-1. motors
3)
|
IM B5 IM B35 IM V1 IM V15
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100 (3.94)
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2LG4312-3CC31 (on request)
|
2K 120
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For SIMOTICS M-1PH813.-1. motors
3)
|
IM B5, IM B35
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118 (4.65)
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2LG4315-3FD11 (on request)
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2K 250
|
IM V1, IM V15
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118 (4.65)
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2LG4315-3FC11 (on request)
|
2K 250
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For SIMOTICS M-1PH816.-1. motors
3)
|
IM B35
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130 (5.12)
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2LG4320-3JD11 (on request)
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2K 300
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IM V15
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130 (5.12)
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2LG4320-3JC11 (on request)
|
2K 300
|
For SIMOTICS M-1PH8184-1. motors
4)
|
IM B35, IM V15
|
180 (7.09)
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2LG4250-1JC11 (on request)
|
2K 800
|
For SIMOTICS M-1PH8186-1. motors
4)
|
IM B35, IM V15
|
180 (7.09)
|
2LG4260-1JC21 (on request)
|
2K 801
|
1) Higher drive speeds are allowed in some instances (refer to the ZF Catalog) with oil-cooled gearboxes and for gear ratios I = 1 .
2) Special versions, such as gearboxes with different torsional backlash, or other gear ratios (i = 3.17 or i = 5.5), are available on request.
3) Requirements: DE shaft end with feather key and full-key balancing.
4) Requirements: DE shaft end with feather key and full-key balancing. Bearing version for coupling output. Shaft and flange accuracy tolerance R. DE flange with shaft seal ring.
Characteristic curves
ENG_110507.XML
The use of a change-speed gearbox permits the constant power range to be greatly increased.
G_NC01_XX_00017
Power-speed graph
Legend:
nrated Rated speed
nrated' Rated speed with two-stage gearbox
nmax Max. permissible speed
Prated Rated power and constant power of the motor in the speed range between nrated and nmax or nrated' and nmax
M Torque
More information