The AirTAC Airtac SCD Standard Cylinder SCD40X150STC 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, 150mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD40X150STC delivers a balanced 528 N of force in both directions at 0.5 MPa, thanks to its double-rod design where the 16 mm rod passes through both end caps. This symmetry is ideal for tasks needing identical push and pull, such as operating a two-sided tool or a transfer shuttle. With a 150 mm stroke, it fits compact machines where space is at a premium but dual-action is non-negotiable.
The centre trunnion (TC) mount allows the cylinder to pivot, absorbing misalignment in swinging or articulating linkages. The built-in magnet lets you clip on CMSG or DMSG sensors directly to the tie-rod barrel for precise end-of-stroke detection without extra brackets. Its 21 mm air cushion at each end quietly decelerates the piston, protecting the end caps during high-cycle operation.
| Model | Airtac SCD Standard Cylinder SCD40X150STC |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 150 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.
| 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.
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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.
Operates tooling on both ends of the cylinder simultaneously, like clamping fixtures on opposite sides of a conveyor, with perfectly matched force and speed in each direction.
The built-in magnet allows direct mounting of CMSG/DMSG sensors on the barrel for confirming end-of-stroke, making it ideal for a reciprocating transfer shuttle in assembly cells.
The centre trunnion mount enables the cylinder to swing as it strokes, perfectly suited for driving a pivoting diverter gate or a swivelling load arm on a packaging machine.
Choose this 40 mm bore when your application requires around 500-950 N of force each way. If you need more thrust, the SCD50 series steps up to 825 N at 0.5 MPa. For purely linear push-only jobs, a single-rod SC cylinder may be a simpler choice, but if you need to mount tooling or a stop on the rear rod, the SCD is the correct call. The TC mount is perfect for pivoting loads, but ensure the trunnion pins are aligned to avoid binding.
To replace an existing unit, match the 40 mm bore, 150 mm stroke, PT ports, centre trunnion mount, and the magnetic piston option. This is a direct drop-in for another AirTAC SCD40X150STC. For strokes over 300 mm on this bore, consider external guides to prevent rod buckling under compressive loads.
Double-rod checklist
The forces are identical in both directions because the rod passes through both ends. At 0.5 MPa you get 528 N, at 0.7 MPa it's 739 N, and at the maximum operating pressure of 0.9 MPa, the force reaches 950 N.
A double-rod cylinder provides equal force and speed in both directions, better resistance to side load due to the dual rod bearings, and a rear rod extension you can use to mount a sensor flag, a mechanical stop, or secondary tooling—features a single-rod cylinder cannot offer.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.