When designing automated machinery, building a linear axis from scratch using separate rails, runner blocks, and drives consumes valuable engineering time. Bosch Rexroth Linear Modules and Linear Axes solve this problem. These pre-assembled, ready-to-install linear subsystems integrate structural profiles, guiding systems, and drive units into a single high-performance package.
This guide explores the three core product lines—CKK, MKK, and MKR—to help you select the ideal linear module product for your automated application.
1. Bosch Rexroth Compact Modules: CKK and CKR Series
The Bosch Rexroth Compact Module (CKK / CKR) product series is engineered for high precision in space-restricted environments. They feature a highly compact aluminum body with two integrated, zero-clearance ball rail systems. [1]
- CKK Series (Ball Screw Drive): Driven by a high-precision Bosch Rexroth Ball Screw Assembly. The CKK series delivers high positioning accuracy, exceptional repeatability, and high feed forces. It is the go-to product for precision pick-and-place, semiconductor handling, and electronic assembly. [1]
- CKR Series (Toothed Belt Drive): Driven by a polyurethane toothed belt reinforced with steel cords. The CKR series is built for high speeds (up to 5 m/s) and long travel lengths where rapid travel times are prioritized over sub-micron repeatability. [1, 2]
2. Bosch Rexroth Linear Modules: MKK and MKR Series
When your automation application demands higher load capacities, longer strokes, and severe torsional resistance, the Bosch Rexroth Linear Module (MKK / MKR) product series is the industry benchmark.
- MKK Series (Ball Screw Drive): This linear module product incorporates a robust, rigid aluminum frame paired with an internal ball screw drive. It is designed to handle high feed forces and heavy loads while maintaining precise linear positioning under continuous duty cycles.
- MKR Series (Toothed Belt Drive): Built for high dynamics and long-distance material handling. The MKR linear module product uses a high-performance toothed belt drive system. It excels in high-speed packaging lines, palletizing systems, and factory logistics where rapid acceleration is essential. [1, 2, 3]
Quick Comparison: Rexroth CKK vs. MKK vs. MKR
+------------------------+------------------------+------------------------+
| Rexroth Product Series | Drive Mechanism Type | Primary Application | +------------------------+------------------------+------------------------+
| Compact Module CKK | Precision Ball Screw | Space-saving precision | | Linear Module MKK | Heavy-Duty Ball Screw | High force & rigid load| | Linear Module MKR | Reinforced Belt Drive | High-speed packaging | +------------------------+------------------------+------------------------+
3. Advantages of Pre-Assembled Rexroth Linear Axes
Choosing a pre-engineered Bosch Rexroth Linear Axis product over a DIY component build offers significant operational advantages:
- Plug-and-Produce Integration: These systems eliminate the need for costly machining, precision leveling, and component alignment in your shop.
- Flexible Motor Mounting: All CKK, MKK, and MKR modules offer flexible motor attachments. You can mount the motor via side-drive gear enclosures or direct linear couplings to fit your physical machine layout.
- Smart Function Kit Compatibility: Many of these modular linear axes serve as the mechanical backbone for Rexroth Smart Function Kits, pairing the axis with smart controllers for immediate plug-and-play assembly.
Sizing Your Modules Digitally
To find the exact part numbers, lengths, and motor mounts for your project, leverage the official digital toolset:
- Open the Linear Motion Technology Selector to input your stroke length, mass, and target cycle times.
- Run your application dynamics through the Linear Motion Designer (LMD) to verify the service life and deflective stress tolerances of your chosen CKK, MKK, or MKR axis.
SEO Meta Data (For Website Implementation)
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Bosch Rexroth linear modules - Secondary Keywords:
Rexroth linear axes,Compact Module CKK,Linear Module MKK,MKR toothed belt drive,ready to install linear units. - Meta Description: Streamline your automation design with Bosch Rexroth linear modules. Compare the CKK, MKK, and MKR series linear axes to find your perfect plug-and-produce system.
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