MD
The Pinnacle of Installation Freedom:
AirTAC MD Series Multi-mount Cylinder Whitepaper
In the development of compact automated machinery, spatial efficiency and structural rigidity are often in direct conflict. Traditional ISO or round cylinders require external mounting brackets (such as LB or FA types), which not only expand the Bill of Materials (BOM) but also introduce unwanted cantilever effects that degrade positioning accuracy. The AirTAC MD Series redefines integration logic by embedding mounting threads directly into the high-rigidity aluminum body.
- Five-Face Installation: Integrated threads on all lateral surfaces allow the cylinder to be bolted directly to the machine frame without external brackets.
- Superior Systemic Rigidity: The cylinder body acts as a primary structural support, eliminating stroke deviations caused by bracket flex.
- Thermodynamic Resilience: Features an aluminum heat-sink block design and optional FKM (Viton) seals for stable operation in environments up to 150°C.
- Industry Interchangeability: 100% dimensional compatibility with the SMC CU series, providing a cost-effective "Second Source" for global supply chains.
- Comprehensive Logic Matrix: Includes standard MD (Double acting), MSD/MTD (Single acting), MDD (Double rod), and MDJ (Adjustable stroke).
1. The "Vanishing Bracket" Engineering Philosophy
The core of the MD Series is "Part-Reduction." By arranging a mounting hole matrix directly on the aluminum block, engineers can achieve ultra-high-density stacking. This layout optimizes rigidity by following the physical constant of direct force transmission:
Structural Stiffness Gain
Total systemic deflection △ is inversely proportional to the mounting stiffness K. By eliminating the flexible bracket component Kbracket, the end-point positioning accuracy is fundamentally enhanced:
$$\delta_{total} = \frac{F}{K_{body}} \ll \frac{F}{K_{body}} + \frac{F}{K_{bracket}}$$
In high-speed Pick & Place applications, this results in shorter residual vibration dampening times, directly improving the machine's Takt Time.
2. Materials Engineering: Thermal Stability
The MD Series is built for harsh industrial environments through precision material selection and surface treatment:
Hard Anodized Body
High-density aluminum alloy treated for extreme compressive strength and heat dissipation, reducing seal fatigue during high-frequency cycles.
High-Temp Seals (FKM)
The -H specification enables operation in mold-processing or thermoforming zones up to 150°C, preventing seal hardening or cracking.
Lube-Free Operation
Honed internal walls and polymer wear rings support No-Lube service, meeting clean-room standards for semiconductor and food packaging.
3. Engineering Warning: The Bolt Depth Logic
Because the MD Series utilizes direct mounting, the selection of bolt length is technically critical. Over-extension can puncture internal air passages, while under-extension risks thread stripping.
⚠️ Critical Design Constraint:
Engineers must verify that the mounting plate thickness matches the effective thread engagement. When carrying dynamic loads F, bolt length should ensure that contact stress σ < [σ]. We recommend a safety clearance of 1.5 mm at the bolt tip to prevent compressive deformation from obstructing the piston path.
4. Advanced Modular Matrix
The MD platform is a suite of solutions for complex kinematic requirements:
- MDD (Double Rod): Dual-rod architecture provides inherent Anti-Rotation, allowing for eccentric load handling without external guides.
- MDJ (Adjustable Stroke): Integrated rear-end adjustment allows for precise micro-tuning of the stop point within a 0 ~ 10 mm range.
- MSD/MTD (Single Acting): Internal high-performance springs enable automatic reset upon air loss, ideal for safety interlocks and simple ejectors.
Technical FAQ
"Can I install magnetic sensors on the MD?"
Yes. The body features standard grooves where sensors can be fully embedded, maintaining the cylinder's sleek, bracket-free profile.
"Is it a direct drop-in for the SMC CU?"
Mounting hole patterns, rod diameters, thread pitches, and overall dimensions are 100% interchangeable, allowing for instant BOM substitution.
The Foundation of Compact Automation
The AirTAC MD Series represents the pursuit of absolute spatial efficiency in modern industry. By eliminating mounting brackets, it grants engineers a higher dimension of layout freedom. Combined with exceptional thermal and structural stability, it remains the most reliable actuator for high-precision, high-density production lines.