Airtac SCJ50 Standard Cylinder SCJ50X200-40
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X200-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø50mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke200 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X200-40
The SCJ50X200-40 is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end tuning directly into the rear cap. With a 50 mm bore and a nominal 200 mm stroke, the built-in adjusting screw gives you up to 40 mm of field-adjustable retraction, so you can dial in the exact end position during commissioning or format changes without adding external hard stops. At 0.5 MPa, it delivers 982 N of push force and 825 N on the pull stroke.
This tie-rod cylinder uses a 20 mm diameter piston rod, PT1/4 ports, and an M16x1.5 rod thread for tooling attachment. The adjustable air cushion provides 21 mm of deceleration at each end, and the body length A(SCJ) measures 194 mm. The SCJ50X200-40 is built for filtered air at 0.15–1.0 MPa and operates reliably from -20 to +70 °C with its standard TPU seals.
Airtac SCJ50 Standard Cylinder SCJ50X200-40 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X200-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| 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 SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X200-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -40 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ50 Standard Cylinder SCJ50X200-40 Is Used
Commissioning & Setup
Engineers can micro-adjust the stroke end by up to 40 mm during initial machine bring-up, eliminating the need to shim or reposition the entire cylinder to hit a precise stop location.
Product Changeover
On packaging or assembly lines running multiple product sizes, the rear screw allows a quick stroke change to accommodate different box heights or part lengths without swapping the actuator.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent clamp force and position.
Is the Airtac SCJ50 Standard Cylinder SCJ50X200-40 the Right Cylinder?
Choose the SCJ50X200-40 when you need a mid-range force actuator that can be fine-tuned on the machine. If your load demands more force, stepping up to the 63 mm bore provides 1559 N of push at the same 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC50X200 offers a simpler, cost-effective alternative. This model is a direct replacement for any AirTAC SCJ50X200-40 with PT ports and basic mounting; ensure the adjustable range, bore, and stroke match exactly.
At a 200 mm nominal stroke, rod deflection under side load is generally manageable, but for any off-axis force, an external guide rail or a switch to a guided cylinder is recommended to protect the rod bearing and seal from premature wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ Required force at your working pressure
- ✓ 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 Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X200-40 FAQ
At the standard 0.5 MPa operating pressure, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. The pull force is lower due to the 20 mm rod reducing the effective piston area on the retract side. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1964 N.
Yes, but only if you need the adjustable stroke feature. The SCJ50X200-40 has the same bore, rod size, and porting as an SC50X200, but its body is slightly longer to house the rear adjusting mechanism. It is a direct dimensional match only for another SCJ50 cylinder with the same nominal stroke and adjust range. Ensure your mounting and port thread (PT) also match.
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