Airtac SCD Standard Cylinder SCD40X15STC
The AirTAC Airtac SCD Standard Cylinder SCD40X15STC is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 15mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke15 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD40X15STC
The SCD40X15STC is a short-stroke double-rod pneumatic cylinder that delivers identical force in both directions—528 N at 0.7 MPa—because the 16 mm rod passes through both end caps. Its 15 mm stroke and centre trunnion mount make it ideal for compact two-sided clamping or ejection where the rear rod can carry a sensor flag or secondary stop.
This configuration includes a built-in magnet for barrel-mounted CMSG/DMSG sensors and a TC centre trunnion (supplied with TCM1 bracket, code F-SC40TC) for pivoting actuation. The adjustable air cushion at each end (21 mm) decelerates the piston smoothly, and the PT1/4 ports keep plumbing simple in tight spaces.
Airtac SCD Standard Cylinder SCD40X15STC Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD40X15STC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 15 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø40mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCD Standard Cylinder SCD40X15STC
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCD Standard Cylinder SCD40X15STC Is Used
Two-Sided Clamping
The through rod allows identical clamping force from both ends, securing a workpiece symmetrically in a fixture without twisting.
Compact Shuttle Gate
With the centre trunnion mount, the cylinder pivots as it extends, making it suitable for a small diverter gate where the rear rod can actuate a limit switch.
Non-Rotating Pusher
The dual-rod design provides better guidance than a single rod, helping to keep a small pusher plate aligned over the short 15 mm stroke.
Is the Airtac SCD Standard Cylinder SCD40X15STC the Right Cylinder?
Choose the SCD40 when you need equal push/pull force and a through rod for dual-end tooling. If 528 N at 0.7 MPa is marginal, step up to the SCD50 (1154 N at 0.7 MPa) for more thrust without a large footprint increase. For applications that only need force from one end, the single-rod SC series reduces rod protrusion on the rear side.
This cylinder is a direct replacement for an existing AirTAC SCD40X15STC. To match performance, verify bore (40 mm), stroke (15 mm), PT port thread, TC centre trunnion mounting, and the -S magnet option. The 15 mm stroke sits well within the 1200 mm maximum standard stroke for this bore.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCD Standard Cylinder SCD40X15STC FAQ
Push and pull force are equal on a double-rod cylinder. At 0.5 MPa it produces 528 N, at 0.7 MPa it is 739 N, and at the maximum operating pressure of 0.9 MPa it reaches 950 N. The theoretical force at 1.0 MPa is 108 kgf.
A double-rod cylinder gives you equal force and speed in both directions and a rear rod extension you can use for mounting sensors, a stroke stop, or secondary tooling. The dual-rod bearing support also resists rotation better than a single-rod design, which is useful for short-stroke alignment tasks.
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