Airtac SCJ50 Standard Cylinder SCJ50X200-40S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X200-40S 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 SCJ50X200-40S
The SCJ50X200-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a nominal 200mm maximum reach that can be shortened by up to 40mm via a rear-cap adjusting screw. With a 50mm bore and 20mm rod, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a strong mid-range actuator for tasks like product clamping or diverting. The built-in magnet (denoted by the -S suffix) allows for direct mounting of CMSG/DMSG/EMSG sensors for precise end-of-stroke detection.
This SCJ model features a PT1/4 port, an M16x1.5 rod thread, and a 21mm adjustable air cushion for smooth deceleration. Its body length A(SCJ) is 194mm, and it operates within a standard pressure range of 0.15-1.0 MPa. The 40mm adjustment range is ideal for commissioning fine-tuning or accommodating wear in mechanical stops without replacing the entire cylinder.
Airtac SCJ50 Standard Cylinder SCJ50X200-40S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X200-40S |
|---|---|
| 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 SCJ50X200-40S
| 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 SCJ50X200-40S Is Used
Commissioning & Setup
The 40mm screw adjustment lets technicians dial in the exact stop position during machine commissioning without cutting brackets or shimming, accelerating line start-up.
Product Format Changeover
Quickly adapt a pusher or stopper's stroke for different product sizes on a packaging line by turning the rear screw, minimizing changeover downtime.
Wear Compensation
In high-cycle clamping fixtures, the adjustable stroke can be extended slightly over time to compensate for wear on contact surfaces, maintaining consistent clamping force.
Is the Airtac SCJ50 Standard Cylinder SCJ50X200-40S the Right Cylinder?
Choose the SCJ50X200-40S when you need a 50mm bore actuator with the flexibility to fine-tune its end position by up to 40mm on the machine. If your force requirement is lower, stepping down to a 40mm bore (628 N push at 0.5 MPa) saves space; for higher force, the 63mm bore provides 1559 N push. A fixed-stroke SC50X200 is a simpler, more compact alternative if stroke adjustment is not required. For a direct replacement, match the 50mm bore, 200mm nominal stroke, 40mm adjust range, PT port thread, basic mounting, and the -S magnet option. As this is a 200mm stroke, ensure the load is guided to prevent rod bending and side-load damage.
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 SCJ50X200-40S FAQ
At the standard 0.5 MPa operating pressure, this 50mm bore cylinder produces 982 N of pushing force and 825 N of pulling force. The maximum push force at 0.9 MPa is 1767 N. The force is identical to a fixed-stroke SC50 cylinder.
A screw in the rear cap sets the physical end-stop for the piston, allowing you to shorten the stroke from its 200mm maximum by up to 40mm. This is a mechanical stroke limiter, not a position lock. The cylinder will not hold its position if air pressure is lost; an external pilot-operated check valve or rod lock is required for load holding.
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