The SMC MSQA20L2 is a compact pneumatic rotary table designed for applications that require stable angular movement, controlled stopping performance, and dependable mechanical positioning in automated equipment. It belongs to SMC’s MSQ series, a rack-and-pinion rotary table family that is available in both high-precision and basic versions, with 90° and 180° rotation options and support for auto switch mounting. Based on SMC’s ordering structure, MSQA20L2 can be understood as a high-precision type, size 20, equipped with a low-energy external shock absorber, and configured as the standard 180° port-location version.
Unlike a simple vane actuator, this rotary table format is built for users who need a more rigid top surface and better suitability for mounting workpieces, fixtures, or transfer components directly on the rotating table. That makes the MSQA20L2 a strong candidate for indexing units, pick-and-place transfer mechanisms, stopper orientation assemblies, compact inspection stations, and light-duty automation modules where clean pneumatic actuation is preferred over more complex servo hardware. Its design focuses on practical repeatability, compact integration, and controlled deceleration at the end of travel.
Product Overview Table
| Item | Description |
|---|---|
| Product Model | SMC MSQA20L2 |
| Product Family | MSQ Series |
| Product Type | Pneumatic rotary table, rack-and-pinion type |
| Bearing Style | High-precision type |
| Size | 20 |
| Shock Absorber Type | External shock absorber for low energy |
| Rotation / Port Configuration | Standard type, 180° |
| Working Fluid | Air, non-lube |
| Maximum Operating Pressure | 1.0 MPa |
| Minimum Operating Pressure | 0.2 MPa |
| Ambient / Fluid Temperature | 0 to 60°C, no freezing |
| Maximum Rotation | 186° |
| Rotation Time Adjustment Range | 0.2 to 2.0 s per 90° |
| Port Size | M5 x 0.8 end ports for size 20; side ports are M5 x 0.8 |
| Allowable Kinetic Energy | 0.574 J for low-energy external shock absorber, size 20 |
| Body Weight | 0.86 kg, excluding auto switch |
The specifications above combine SMC’s MSQ series configuration logic with the official technical table for the external shock absorber type. In the ordering structure, L identifies the low-energy shock absorber, while 2 identifies the standard 180° arrangement. The official weight table lists 860 g for the size 20 external shock absorber 180° specification, excluding auto switch weight.
Detailed Product Description
The MSQA20L2 is best described as a compact pneumatic rotary positioning unit built for machine designers who want a balance between small footprint and controlled angular movement. Because it uses a rack-and-pinion rotary table structure rather than a simple rotary vane format, it is more suitable for top-mounted fixtures and components that need to rotate to a defined position with good mechanical stability. In practical automation design, this makes the model especially useful in assemblies where a component must be turned, re-oriented, presented to a sensor, or transferred between two stations in a predictable motion sequence.
A major advantage of this exact model is its high-precision type configuration. SMC distinguishes the MSQ family between A = high-precision type and B = basic style, and MSQA20L2 belongs to the more precise side of that product structure. For users building indexing modules, assembly fixtures, small packaging equipment, or pneumatic transfer devices, that matters because the rotary table is not just moving through an angle; it is also acting as a functional mounting surface. The high-precision version is therefore better aligned with equipment where rotation quality, stop consistency, and mounting confidence are more important than simply obtaining angular motion at the lowest possible cost.
Another important feature is the external shock absorber for low energy. This is not merely a cushioning detail. It changes how the rotary table absorbs motion at the end of travel and helps the unit manage controlled deceleration in moderate-energy applications. For the size 20 version, SMC specifies an allowable kinetic energy of 0.574 J for the low-energy external shock absorber configuration. This makes the MSQA20L2 a sensible choice for relatively light loads and moderate indexing speeds where designers want smoother stopping behavior than a simple rubber bumper solution can offer, but do not need the higher-energy version of the same platform.
The 180° standard configuration is another practical strength of the MSQA20L2. In many industrial machines, two-position rotation is enough: load and unload, inspect and release, clamp and return, present and reset. The model code indicates the standard 180° arrangement, and SMC lists the external shock absorber type as available in 90° and 180° versions, with a maximum rotation of 186° and end adjustment around each rotation end. This gives integrators enough tuning flexibility to align the rotary table with real mechanical stops, sensors, and fixture geometry without turning the system into an overly complex servo axis.
From a pneumatic integration perspective, the model remains straightforward. SMC specifies air (non-lube) as the working fluid, with a maximum operating pressure of 1.0 MPa, a minimum operating pressure of 0.2 MPa, and an ambient/fluid temperature range of 0 to 60°C without freezing. The published rotation time adjustment range is 0.2 to 2.0 seconds per 90°, and for size 20 the port specification is M5 x 0.8. These parameters make the MSQA20L2 relatively easy to integrate into compact pneumatic panels and machine frames, especially in systems that already use standard SMC air preparation, valve, and flow-control components.
Weight is often ignored in short catalog summaries, but for real machine design it matters. For the size 20 external shock absorber 180° specification, SMC lists the product weight as 860 g, excluding the weight of any auto switch. That figure is useful for several reasons. First, it gives design engineers a better idea of how the unit will affect the moving mass or mounting bracket design. Second, it helps estimate shipping and packaging more accurately. Third, it provides a better basis for comparing the MSQA20L2 with alternative rotary actuators or other indexing mechanisms in the same compact automation class. If optional switches or accessories are added, the final assembly weight will rise accordingly.
Why the SMC MSQA20L2 Is a Practical Choice
For buyers and engineers, the MSQA20L2 stands out because it is not just a generic pneumatic rotary actuator. It is a high-precision rotary table with a defined size 20 platform, a low-energy external shock absorber, and a standard 180° configuration that fits many common automation tasks without unnecessary complexity. It is compact enough for space-conscious machine layouts, yet structured enough to serve as a true rotary mounting table rather than just a rotating shaft output.
In summary, the SMC MSQA20L2 is well suited for compact industrial automation systems that require reliable pneumatic rotation, stable table mounting, and clean end-of-stroke control. Its official body weight of 0.86 kg gives it a favorable balance between rigidity and integration convenience, while the MSQ platform’s rack-and-pinion design supports practical use in indexing, orienting, transfer, and fixture-based motion applications. For users seeking a compact, well-defined SMC rotary table with a more refined mechanical configuration than entry-level rotary actuators, the MSQA20L2 is a technically sound and commercially relevant option.
