Airtac SCJ50 Standard Cylinder SCJ50X140-100
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X140-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø50mm bore, 140mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke140 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X140-100
The SCJ50X140-100 is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands via a rear-cap adjusting screw. With a 50 mm bore delivering 982 N of push force at 0.5 MPa (1767 N at 0.9 MPa) and a 20 mm piston rod, this unit provides a 100 mm adjustable range, letting you shorten the 140 mm nominal stroke on the machine without swapping the cylinder.
This tie-rod cylinder uses a PT1/4 port and M16x1.5 rod thread, with a 21 mm air cushion to decelerate the piston smoothly. The body length A is 194 mm, and the standard stroke ceiling for this bore is 1200 mm, so this model is well within the standard offering. The adjusting screw only sets the stroke end position; it is not a force or speed regulator.
Airtac SCJ50 Standard Cylinder SCJ50X140-100 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X140-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 140 mm |
| Stroke adjustment | Up to 100 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 SCJ50X140-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×140 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ50X140-100 Is Used
Commissioning & Setup
Dial in the exact 140 mm stroke end position during initial machine setup. The 100 mm adjustment screw allows engineers to fine-tune the actuator's stop point without fabricating external hard stops, speeding up line commissioning.
Format Changeover
Quickly adapt a packaging machine's pusher stroke for different box sizes. The field-adjustable screw lets operators shorten the stroke from 140 mm down to 40 mm in seconds, minimizing downtime between production runs.
Wear Compensation
Take up mechanical play in a clamping or pressing fixture over time. As tooling wears, the rear screw can be advanced to restore the precise end-of-stroke position, maintaining consistent 1767 N clamping force at 0.9 MPa.
Is the Airtac SCJ50 Standard Cylinder SCJ50X140-100 the Right Cylinder?
Choose the SCJ50X140-100 when your application requires a 50 mm bore's force class but the exact stroke length needs to be dialed in during commissioning or changeover. If you need more force, step up to the 63 mm bore, which provides 1559 N of push at 0.5 MPa. For applications where the stroke is permanently fixed, the standard SC50 series offers a simpler, non-adjustable alternative. This model is a direct replacement for another AirTAC SCJ50 cylinder with a 140 mm nominal stroke and a 100 mm adjustment range, matching PT ports and basic mounting. For strokes of 300 mm or more, evaluate side-loading and rod bending; an external guide or guided cylinder is recommended for off-axis loads.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ50X140-100 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 maximum push force at the 0.9 MPa operating limit is 1767 N. The pull force is lower because the 20 mm piston rod reduces the effective piston area on the return stroke.
A screw in the rear cap acts as an internal, movable end-stop for the piston. Turning the screw changes the stroke end position within a 100 mm range, allowing you to shorten the 140 mm nominal stroke. It does not adjust the cylinder's speed or force, only the physical stopping point of the piston rod's extension.
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