Airtac SCJ100 Standard Cylinder SCJ100X250-50STC
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X250-50STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø100mm bore, 250mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke250 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X250-50STC
The SCJ100X250-50STC is a double-acting, single-rod pneumatic cylinder offering a 50 mm field-adjustable stroke range, allowing you to fine-tune the end position without removing the cylinder. With a 100 mm bore, it delivers a substantial 3927 N of push force at 0.5 MPa, making it a powerful actuator for heavy-duty positioning tasks.
This model features a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and a TC centre trunnion pivot for applications requiring the cylinder to swing. The 25 mm piston rod and PT1/2 ports ensure robust fluid flow, while the 29 mm air cushion provides smooth deceleration at the stroke's end.
Airtac SCJ100 Standard Cylinder SCJ100X250-50STC Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X250-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCJ100 Standard Cylinder SCJ100X250-50STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ100 Standard Cylinder SCJ100X250-50STC Is Used
Format Changeovers
Quickly adjust the end stop for different product sizes on packaging or palletizing machinery without mechanical modifications, saving valuable production time.
Clamping & Pressing
Fine-tune the final clamping position to accommodate varying material thicknesses in pressing, gluing, or welding fixtures, ensuring consistent quality.
Wear Compensation
Compensate for tooling or pad wear over time by simply turning the rear adjusting screw to maintain the precise stroke end position, extending maintenance intervals.
Is the Airtac SCJ100 Standard Cylinder SCJ100X250-50STC the Right Cylinder?
Choose the SCJ100X250-50STC when you need high force and the ability to dial in the stroke end point during commissioning or changeovers. If 3927 N of push force at 0.5 MPa is more than required, stepping down to an 80 mm bore provides 2513 N. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This cylinder is a direct replacement for another AirTAC SCJ100 with a 250 mm nominal stroke, 50 mm adjust range, PT ports, TC mount, and magnet.
For this 250 mm stroke, ensure the load is guided to prevent side-loading and rod bending. If external guides are not feasible, consider a guided cylinder assembly to protect the rod and seals from premature wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ100 Standard Cylinder SCJ100X250-50STC FAQ
At the standard 0.5 MPa operating pressure, the push force is 3927 N and the pull force is 3681 N. The maximum push force at 0.9 MPa is 7068 N. Because it is a single-rod cylinder, the push force is always greater than the pull force.
The rear cap has an adjusting screw that sets the stroke end position. You can shorten the nominal 250 mm stroke by up to 50 mm in the field. This allows for precise end-point tuning without needing to change the cylinder or add external hard stops.
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