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Description
Product description
Rexroth linear modules are precise, ready-to-mount guide systems that combine high-performance characteristics with compact dimensions. Rexroth provides a favorable price/performance ratio and fast delivery times.
Structural design
- Ready-to-install linear modules in any length up to Lmax
- Realization of greater lengths of up to 6000 mm
- Rigid aluminum profile frame with Rexroth ball rail system with cover strip
- Ball runner block with moderate preload (preload class C1)
- Aluminum carriages with T-grooves and centering holes
- Economical maintenance thanks to the central relubrication option (grease lubrication or oil lubrication) from both sides via the carriage
- High-performance toothed belt (AT profile) for high drive torques with simultaneously high rigidity
Attachments
- Planetary gearbox with various gear ratios
- Motor attachment kits according to customer specification
- Servomotor
- Magnetic field sensors for easy assembly
- Switch (proximity or mechanical) cable channel, socket-plug and extension cables in the accessories program
Attachments (range of accessory products)
- Clamping fixtures and sliding blocks
- Connecting shafts
- Connecting technology for linear motion systems
- Sensors and extension cables
Material pairing
ALST:
- Main body, carriage and end enclosures made of anodized aluminum (AL)
- MKR-065/-080/-110/-140/-145: ball rail and ball runner block made of rolling bearing steel (ST)
- MKR-040: Ball rail and ball runner block of rust and acid resistant material
- Grooved ball bearing of the drive mechanism (belt pulleys) made of rolling bearing steel
ALCR:
- Frame, carriage and end enclosures made of anodized aluminum (AL)
- MKR-065/-080/-110/-140/-145: Ball rail made of rolling bearing steel with corrosion resistant coating, matte-silver finish, hard chrome plated (Resist CR). ball runner block made of corrosion-resistant steel (Resist NR)
- MKR-040: Ball rail and ball runner block of rust and acid resistant material.
- Grooved ball bearing of the drive mechanism (belt pulleys) made of rolling bearing steel
LSS
lubrication versions: (Initial lubrication done at the factory)
- Initial standard greasing done at the factory, suitable for normal ambient conditions.
- Simple relubrication via manual grease gun.
- MKR-065/-080/-110/-140/-145: Grease lubricant Dynalub 510, NLGI grade 2 lithium-based high-performance grease according to DIN 51818 (KP2K-20 according to DIN 51825)
- MKR-040: Grease lubricant Dynalub 520, lithium-based high-performance grease of the NLGI grade 00 according to DIN 51818 (G00K-20 according to DIN 51826)
LPG: (Corrosion prevention, no initial lubrication)
- Linear module without initial greasing done at the factory.
- Ball rail system, only with corrosion prevention.
- Basic lubrication required
LCF: (prepared for connection to central lubrication systems with liquid grease)
- for liquid grease, NLGI grade 00 lithium-based high-performance grease according to DIN 51818 (GP00K-20 according to DIN 51826)
- Only use liquid grease lubrication with single-line total-loss lubrication systems via piston distributors.
- Basic lubrication required
LCO: (prepared for connection to central lubrication systems with oil)
- ball runner block with integrated non-return valves
- Only use oil lubrication with single-line total-loss lubrication systems via piston distributors.
- Basic lubrication required
Models
| 1) | Journal for motor attachment right or left |
| 2) | Journal for motor attachment on both sides |
| 3) | With gear reducer (motor mounting via clamping hub) |
Carriage variants
Carriage (TT) with T-grooves
Structure and attachments
Structural design
1 End head (drive side)
2 Ball rail systems
3 Toothed belt drive
4 Carriage
5 End head (clamping side)
6 Main body
Attachments:
7 Magnetic sensor
8 Cable channel
9 Switch bracket
10 Proximity switch
11 Mechanical switch
12 Socket/plug
Technical data
General technical instructions
Note on dynamic load capacities and load moments
Determination of the dynamic load capacities and load moments is based on a travel life of 100 000 m. Often only 50 000 m is actually stipulated.
For comparison:
Multiply values C, Mt and ML from the table by 1.26.
Suitable loads
Regarding the desired nominal life, in general loads for Fcomb, Fm up to around 20 % of the dynamic characteristic values (C, Mt, ML) have generally proven suitable.
See the "Calculation" document in the "Project planning instructions" chapter for the respective Linear Module.
Do not exceed the technical data for the Linear Motion System.
Application point of the effective force (Z1)
Modulus of elasticity E of the Linear Motion System
General technical instructions
Length calculation of the Linear Motion System
For length calculation values, see the "General Technical Data" table.
Note: Adhere to the section "General technical instructions" and the document "Calculation" in the chapter "Project planning instructions".
Load capacities and moments
| Size | MKR-145 | |
| Number of carriages | 1 | |
| Lca | mm | 400 |
| Cgw | N | 121190 |
| Mt | Nm | 7030 |
| ML | Nm | 17630 |
| Mx max | Nm | 2500 |
| My max | Nm | 6300 |
| Mz max | Nm | 7200 |
| Fy max | N | 49400 |
| Fz1 max | N | 49400 |
| Fz2 max | N | 43200 |
| Z1 | mm | 50.5 |
| ly | cm⁴ | 3055 |
| lz | cm⁴ | 1965 |
General technical data
| Size | MKR-145 | |
| Number of carriages | 1 | |
| Lca | mm | 400 |
| Lad | mm | 40 |
| smin 1) | mm | 80 |
| Lmax | mm | 6000 |
| mca | kg | 9.8 |
| Repeatability (up to ...) | mm | ± 0.05 |
| 1) | Minimum required travel to ensure a reliable lubrication distribution! If this cannot be achieved, please consult Bosch Rexroth. |
General Technical Data dependent on design / gear unit
| Size | Design / gear unit | kg fix | kg var | Lad |
| kg | kg/mm | mm | ||
| MKR-145 | F010, F011, F020 | 11,5 | 0,0357 | 40 |
| G010, G011 | 11,8 |
Getriebedaten
| Size | Gear type1) | i | Mge2) | MRge | nge2) | Jge | mge | Motor |
| Nm | Nm | rpm | kgm2 | kg | ||||
| MKR-145 | PG080 | 3 | 136 | 0,60 | 7000 | 0,0001520 | 3,0 | MS2N06 |
| 5 | 176 | 0,40 | 0,0001290 | 3,0 | MS2N06 | |||
| PG120 | 3 | 184 | 1,20 | 6500 | 0,0004723 | 7,4 | MS2N07 | |
| 5 | 312 | 0,90 | 0,0003995 | MS2N07 | ||||
| 10 | 152 | 0,65 | 0,0001378 | 6,2 | MS2N06 | |||
| 0,0003744 | 7,4 | MS2N07 |
| 1) | Planetary gearbox |
| 2) | The limits of the linear motion system must not be exceeded. For more information about calculations, see the chapter "Project planning instructions". |
Note: Adhere to the section "General technical instructions" and the document "Calculation" in the chapter "Project planning instructions".
Drive data
| Size | i | Mp | u | vmax |
| kJ fix | kJ var | kJ m | MRs | d3 | Bt | Fbp4) | Ft zul5) | cspe | amax |
| Nm | mm/U | m/s | kgmm2 | kgmm | mm2 | Nm | mm | N | N | N | m/s2 | ||||
| MKR-145 | 11) | 100,0 | 290,00 | 5,0 |  | 22554 | 1,2326 | 2125 | 6,7 | 92,31 | 50AT10 | 2160 | 8500 | 2,12 x 106 | 50 |
| 13) | 48,0 | ||||||||||||||
| 32) | 33,3 | 96,67 | 5,0 |  | 22784 | ||||||||||
| 52) | 20,0 | 58,00 | 5,0 | ||||||||||||
| 102) | 10,0 | 29,00 | 3,1 |
| 1) | Valid for versions: 1 or 2 drive journals |
| 2) | Valid for versions: clamping hub or clamping hub with 2nd journal |
| 3) | Version with keyway |
| 4) | Maximum power that can be transmitted through the engaging teeth that are in the belt pulley. |
| 5) | The maximum permissible tensile load on the belt cross section (belt elasticity limit) is given here for easier comparability. This value represents the load limit in terms of plastic deformation and may not be used to calculate the maximum permissible drive torque. |
| 6) | With IMS. |
Note: Adhere to the section "General technical instructions" and the document "Calculation" in the chapter "Project planning instructions".
Normal operating conditions
| Size | MKR-145 | |
| Permissible ambient temperature with Rexroth servo motor 1) | 0 °C ... +40 °C | |
| Permissible ambient temperature for mechanical system 2) | -10 °C ... +60 °C | |
| smin 3) | mm | 80 |
| 1) | Performance losses from 40°C |
| 2) | No passing below the dew point |
| 3) | Minimum required travel to ensure a reliable lubrication distribution! If this cannot be achieved, please consult Bosch Rexroth. |
Note: Application of dirt is not permitted!
Legend
| Symbol | Description | Unit |
| amax | Maximum acceleration travel | m/s2 |
| Bt | Belt type | - |
| Cgw | Dynamic load capacity, linear guide | N |
| cspe | Specific spring rate | N |
| d3 | Diameter, belt pulley | mm |
| Fbp | Maximum belt drive transmission force | N |
| Ft zul | Belt elasticity limit | N |
| Fy max | Maximum dynamic load in y-direction | N |
| Fz max | Maximum dynamic load in z-direction | N |
| i | Gear ratio of the gear | - |
| kg fix | Constant for fixed portion of the mass | kg |
| kg var | Constant for variable-length portion of the mass | kg/mm |
| kJ fix | Constant for fixed-length portion of mass moment of inertia | kgmm2 |
| kJ m | Constant for mass-specific portion of mass moment of inertia | mm2 |
| kJ var | Constant for variable-length portion of mass moment of inertia | kgmm |
| L | Length | mm |
| Lad | Additional length | mm |
| Lca | Carriage length | mm |
| Lmax | Maximum length | mm |
| Lw | Carriage center-to-center distance | mm |
| ly | Y-axis planar moment of inertia | cm4 |
| lz | Z-axis planar moment of inertia | cm4 |
| mca | Moved mass of system (carriage) | kg |
| ML | Dynamic longitudinal moment load capacity | Nm |
| Mp | Maximum permissible drive torque of the linear system | Nm |
| MRs | Frictional torque of the system | Nm |
| Mt | Dynamic torsional moment load capacity | Nm |
| Mx max | Maximum admissible torsional moment around the x-axis | Nm |
| My max | Maximum admissible torsional moment around the y-axis | Nm |
| Mz max | Maximum admissible torsional moment around the z-axis | Nm |
| se | Excess travel | mm |
| seff | Effective travel distance | mm |
| smax | Maximum travel range | mm |
| smin | Minimum travel | mm |
| u | Lead constant | mm/U |
| vmax | Maximum permissible speed | m/s |
| Z1 | Application point of the effective force | mm |
Maximum values for each size
| Size | MKR-145 | |
| Cgw | N | 121190 |
| Mt | Nm | 7030 |
| Mx max | Nm | 2500 |
| My max | Nm | 6300 |
| Mz max | Nm | 7200 |
| Fy max | N | 49400 |
| Fz1 max | N | 49400 |
| Fz2 max | N | 43200 |
| Lmax | mm | 6000 |
Diagrams/characteristic curves
Deflection
The diagram applies to: both ends firmly fixed (approx. 350 mm per side), 6 to 8 screws per side, fixed substructure
Example
Linear module MKR-145: L = 4000 mm; F = 2000 N; from diagram: f = 0.43
The deflection f lies well below the maximum permissible deflection fmax, so no additional supports are required.
Dimensions
All dimensions in mm. Drawings not to scale.
Frame dimension drawings
| 1) | M8 - 18 deep (4x) |
| 2) | Ø8 x 16H7 - 3.1 deep |
| 1a/1b, 3a/3b: Lubrication required on connection 1 and 3, either side a or side b; funnel-type lube nipple DIN 3405 A M8 x 1 | |
| Lad = Additional length, see "Technical data" chapter |
| 1) | 5x ⌀16H7 3.1 deep |
| 2) | 16H8 - 3.1 deep |
| 1) | For sensor |
| 2) | DIN 508-M8 DIN 557-M10 |
Project planning information
Calculation example MKR with gear reducer
Calculation
Mounting
Mounting
General information
The linear modules are mounted using various fastening elements:
- Clamping fixtures
- Sliding blocks for size -110 and up
- Square nuts
- Spring nuts
- Screws for T-slots as per DIN 787 (no picture).
Length depends on base.
When mounting Linear Modules, please note the maximum tightening torques listed in the table.
Fastening MKR-145-NN-3
| 1) | Mounting on frame for horizontal operation |
| 2) | Mounting on the carriage for vertical operation |
| Size | A | B | C |
| (mm) | (mm) | (mm) | |
| -040 | 52,2 | 65,5 | - |
| -065 | 81,0 | 95,0 | - |
| -080 | 96,0 | 110,0 | - |
| -110 | 132,0 | 150,0 | 85,0 |
| -140 | 167,0 | 193,0 | 105,0 |
| -145 | 172,0 | 198,0 | 78,0 |
| -165 | 192,0 | 218,0 | 120,0 |
Do not support the linear module on end enclosures, end blocks or on end plates!
The frame is the load-bearing part!
Tightening torques of fastening screws
with friction factor 0.125 strength class 8.8
 | 8.8 | M4 | M5 | M6 | M8 | M10 | M12 |
 | (Nm) | 2,7 | 5,5 | 9,5 | 23 | 46 | 80 |
Overview of the switching system
1 Socket and plug
2 Mechanical switch with attachments
3 Proximity switch
4 Switch bracket
5 Mounting channel / cable channel
6 Magnetic field sensor with fixed potted cable
(Reed/Hall sensor (for mounting channel))
7 Reed/Hall sensor with plug and sensor holder
7a: Magnetic sensor
7b: Sensor holder incl. set screws (loose) and square nut
7c: Cable holder (3 pcs) incl. set screw (loose)
7d: M8x1 plug (3-pin)
8 Magnetic switch with M8x1 plug
9 Clamping screw
10 Sliding block
Switch connection MKR-145-NN-3
Magnetic sensor with M8x1 plug
The switch activator is a magnet (on both sides) that is integrated in the carriage (no switch bracket necessary). The switch activation points can be positioned anywhere along the stroke. For position solenoid switch, see the linear module instructions R320103169.
Mounting instructions:
Slide sensor holder (a) into the sensor slot (S), position approximately and fix with two set screws (b).
Then install the magnetic sensor (8) in the sensor holder and fix by turning the clamping screw (9).
Proximity sensors, mechanical switches and accessories (MKK/MKR/MLR)
Mounting instructions:
The mechanical switches, the proximity sensors and the socket with plug and cable channel are fastened with attachments in T-grooves of the main body. Switch activation is carried out by a switch bracket on the carriage.
| Position | Name | Size -065/-080/-140 /-145-NN-3 | -110-NN-3 | -165-NN-2 |
| Material number | ||||
| 1 | Socket-plug | R117500153 | ||
| 2 | Mechanical switch | see accessories | ||
| Mechanical switch with attachments | R117500151 | |||
| 3 | Proximity sensor | see accessories | ||
| - Attachment parts without sensor | R117500152 | R117520152 | R117500152 | |
| 4 | Switching angle | R117500149 | R117500150 | |
| 5 | Cable duct | R039662017 | ||
| These switching versions can only be ordered with these material numbers. |
| Proximity sensor with additional attachment for | Proximity sensor with additional attachment for | Mechanical switch with attachment for |
 |  |  |
| 1) | Cable length: 3 m |
Mounting examples of switches
Determination of the switching position
Switching distance: The switching distance is the distance between the carriage center (TM) and the zero point (0) when a switch is actuated (indicated in mm). Example of a mechanical limit switch (assuming the zero point is at L/2):
Maximum switching distance = 0.5 x (max. travel distance) – excess travel = 0.5 x effective stroke
For safe operation of the linear module the excess travel must be greater than the braking path.
For MKR... and MLR...: The acceleration travel sa can be assumed as the reference value for the braking distance.
For MKK...: In most cases, the following is sufficient as a guideline value for the excess travel (braking path): Excess travel = 2 x screw lead P.
Note the smallest possible switching distance (determined by attachments):
mechanical-mechanical = 60 mm; mechanical-proximity = 45 mm; proximity-proximity = 28 mm.
for MKR-145: mechanical-mechanical = 62 mm; mechanical-proximity = 49 mm; proximity-proximity = 35 mm
The switches as well as socket with plug are fixed in the upper T-slots of the frame and actuated by a switch tab on the carriage.
Mounting side of the switches:
| 1) | links (L) |
| 2) | right (R) |
| 3) | Direction of travel |
| 4) | 0.5 x stroke |
| 5) | Excess travel |
| 6) | 0.5 x max. travel path |
Switch connection
S = Slot for sensor holder MKR-145-NN-3
| 1) | Mechanical and proximity switch |
| 2) | Magnetic sensor |
Commissioning
Parameterization (start-up)
The nameplate contains reference information on the production of the linear motion system as well as technical start-up parameters.
| Position | Symbol | Description |
| 1 | CNR | Customer's part number |
| 2 | TYP | Short product name |
| 3 | 110 | Size |
| 4 | CS | Customer information |
| 5 | MNR | Part number |
| 6 | FD | Manufacturing date |
| 7 | 7210 | Manufacturing location |
| 8 | smax | Maximum travel range |
| 9 | u | Lead constant without motor attachment |
| 10 | vmax | Maximum speed |
| 11 | amax | Maximum acceleration travel |
| 12 | M1max | Maximum drive torque at motor journal |
| 13 | d | Direction of motor rotation to move in positive (+) direction CW = clockwise CCW = counter clockwise  |
| 14 | i | Gear ratio |
| 15 | QR code |
Maintenance
Lubrication
Safety Instructions
Required and supplementary documentation
For further instructions and information, please refer to the documentation for this product.
You can find PDF files of these documents on the Internet at www.boschrexroth.com/mediadirectory.
We would also be happy to send you the documents that you want.
If you are unsure about using this product, please contact Bosch Rexroth.
Motor attachment
All dimensions in mm. Drawings not to scale.
| 1) | M8 - 18 deep (4x) |
| 2) | M8 - 18 deep (8x) |
| 3) | Version G010, G011: second journal only for drive option 016/018 |
Abmessungen
| Size | i | Motor | Motor coding | ▢ E | Lf | Lge |
| mm | mm | mm | ||||
| MKR-145-NN-3 | 3 / 5 | MS2N06 | MS2N06-B1BNN | 115 | 50 | 113,5 |
| MS2N06-D1BNN | 131,5 | |||||
| 10 | MS2N06 | MS2N06-B1BNN | 62 | |||
| MS2N06-D1BNN | ||||||
| 3 / 5 / 10 | MS2N07 | MS2N07-B1BNN | 140 | 147,0 | ||
| MS2N07-C1BRN | ||||||
| MS2N07-D1BNN |
Downloads
 | Declaration of Incorporation for single axis Linear Motion Systems Certificate | R320103141 | 2020-06-01 | All languages | PDF | 409k Product Groups: Linear axes and electromechanical cylinders |
| Safety Instructions for Linear Motion Systems Manual | R320103152_en | 2015-01-01 | English | PDF | 593k Product Groups: Linear axes and electromechanical cylinders |
| Linear Modules MKK / MKR / MLR Catalog | R999000496 | 2021-03-01 | English | PDF | 17.5MB Product Groups: Linear Modules |
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