AirTAC Pneumatics
AirTAC SCD Series Double-Rod Cylinders
The AirTAC SCD series is a double-acting tie-rod double-rod air cylinder spanning 32-250 mm bores, delivering identical push and pull force for applications requiring anti-rotation and dual-end tooling.
inventory_21012 models availableSeries Overview
The AirTAC SCD series features a double-rod construction where the piston rod passes through and protrudes from both end caps. Because both chambers lose the rod area, the push and pull forces are identical in both directions. This design provides inherent anti-rotation and allows the rear rod to drive a second tool or carry a sensor cam.
The range covers 10 bores from 32 to 250 mm, with rod diameters from 12 mm up to 50 mm. Standard strokes reach up to 1000 mm for bore 32, 1200 mm for bores 40-50, and 1500 mm for bores 63-250. Force at 0.5 MPa spans from 345 N to 23562 N, with a theoretical maximum force at 1.0 MPa spanning 70 kgf to 4805 kgf.
Shared design features include double-acting operation and adjustable air cushions at both ends. The cushion decelerates the piston near stroke end but does not lock or hold the load when pressure is lost. Operating pressure is 0.15-1.0 MPa, proof pressure is 1.5 MPa, and temperature range is -20 to +70 C. Air must be filtered to 40 um. Port threads are PT standard with G optional, ranging from PT1/8 to PT1. The SCD is a tie-rod cylinder and is not ISO 15552 drop-in interchangeable, though bores 125-250 fall under the ISO 6430 class. A magnet option (-S) supports reed and solid-state sensors.
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Typical Applications
Transfer Line Pushers
The double-rod design provides anti-rotation for pushing parts along conveyor belts, ensuring the tool face stays square to the workpiece without twisting under off-center loads.
Dual-Action Packaging Arms
The protruding rear rod can drive a secondary mechanism or sensor cam, allowing a single SCD cylinder to synchronize two packaging motions or confirm position from the back end.
Equal-Force Clamping Stations
Because both chambers lose the rod area, the SCD delivers identical push and pull force, making it ideal for clamping stations where the clamp and release forces must be perfectly matched.
How to Choose the Right Model
Select the bore size based on your required force class, keeping in mind that a double-rod cylinder yields less force than a single-rod SC push because both sides lose rod area. Match the stroke to your travel requirement, observing the per-bore stroke limits (1000 mm for bore 32, 1200 mm for bores 40-50, 1500 mm for bores 63-250). Choose the -S magnet option if you need position sensing via CMSG, DMSG, or EMSG sensors. Confirm the port thread (PT standard or G optional) and mounting style from the available SC subset: Basic, FA, LB, TC, TCM1.
If your application requires a drop-in ISO 15552 double-rod interface, step out of the SCD series and use the AirTAC SAID series. For single-rod, adjustable-stroke, or multi-position needs on the same platform, consider the AirTAC SC, SCJ, or SCT series. When ordering a replacement, confirm these 5 points: bore size, stroke, port and thread type, mounting style, and magnet option.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and available mounting space
- ✓ Port / thread type (PT / NPT / G)
- ✓ Sensor / magnet option (-S)?
- ✓ Side load — consider a guided model
Frequently Asked Questions
The SCD series spans 10 bores from 32 to 250 mm. Force at 0.5 MPa ranges from 345 N to 23562 N. The theoretical maximum force at 1.0 MPa spans 70 kgf to 4805 kgf. Standard strokes reach up to 1500 mm depending on the bore size.
No, the SCD is a tie-rod cylinder and is physically shorter than ISO 15552 profiles, so it is not a drop-in ISO swap. However, the larger bores (125-250 mm) fall under the ISO 6430 class. If you need an ISO 15552 double-rod interface, use the AirTAC SAID series.
No. The adjustable air cushion at both ends only decelerates the piston near the stroke end. It does not lock, brake, or hold the load when air pressure is lost. If load holding is required, you must use a separate mechanical lock, rod brake, or pilot check valve.
Confirm these 5 points from your existing unit: bore size, stroke, port and thread type (PT standard or G optional), mounting style (Basic, FA, LB, TC, or TCM1), and whether you need the -S magnet option for position sensors.
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