Airtac SCD Standard Cylinder SCD50X50S
The AirTAC Airtac SCD Standard Cylinder SCD50X50S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 50mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke50 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD50X50S
The SCD50X50S is a 50 mm bore double-rod pneumatic cylinder delivering balanced bidirectional thrust—825 N in both extend and retract at 0.5 MPa, rising to 1484 N at 0.9 MPa. Its through-rod design (Ø20 mm rod on both ends) subtracts the rod area from both piston faces, so push and pull forces are identical, making it ideal for applications that demand symmetric motion or tooling on both sides.
This short 50 mm stroke model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the tie-rod barrel for non-contact position sensing. With a body length A(SCD) of 207 mm, adjustable air cushion (21 mm), and PT1/4 ports, it operates on 40 µm filtered air from 0.15 to 1.0 MPa across a -20 to +70 °C temperature range.
Airtac SCD Standard Cylinder SCD50X50S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD50X50S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 50 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 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 SCD50X50S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×50 | 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 SCD50X50S Is Used
Two-Sided Transfer Shuttles
The equal 825 N force in both directions and a rod at each end let you mount identical grippers or tooling plates on both sides, perfectly synchronising a pick-and-place shuttle.
Rear-Mounted Stroke Sensing
With the built-in magnet, clamp a DMSG sensor on the rear rod end to confirm full retraction in tight spaces where the front cap is inaccessible, simplifying control logic.
Anti-Rotation Alignment Pushers
The dual-rod support naturally resists rod rotation. Use the SCD50X50S for short-stroke pressing or alignment tasks where a twisting single-rod tool would cause misalignment.
Is the Airtac SCD Standard Cylinder SCD50X50S the Right Cylinder?
Choose the SCD50 when you need equal force in both directions without the complexity of external linkages. If your load requires more thrust, step up to the SCD63, which provides 1402 N at 0.5 MPa. For single-direction work where only one rod end is used, the single-rod SC50 is a lighter, more compact alternative. This double-rod cylinder offers better rod guidance than a single-rod type, but sustained side loads still call for an external guide rail or a dedicated guided cylinder.
To replace an existing SCD50X50S, match five points: 50 mm bore, 50 mm stroke, PT port thread, basic mounting (no bracket), and the built-in magnet. The SCD is a tie-rod cylinder; it is not dimensionally interchangeable with ISO 15552 profiles.
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 SCD50X50S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 825 N, at 0.7 MPa it outputs 1154 N, and at the maximum operating pressure of 0.9 MPa it reaches 1484 N. The theoretical force at 1.0 MPa is 168 kgf.
Pick the SCD50 when you need symmetric force and speed in both directions, or when you want to attach tooling, a stopper bolt, or a sensor flag to the rear rod. The through-rod also provides better bushing support than a single-rod cylinder, reducing rod deflection in short-stroke applications.
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