Airtac SCJ100 Standard Cylinder SCJ100X250-50SH
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X250-50SH 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 SCJ100X250-50SH
The SCJ100X250-50SH is a double-acting, single-rod pneumatic cylinder engineered for applications where the stroke end position must be finely tuned on the machine. A rear-cap adjusting screw provides a 50 mm adjustment range, allowing you to shorten the nominal 250 mm stroke without replacing the cylinder. This model is configured with a built-in magnet for sensor mounting and high-temperature Viton (FKM) seals, extending the operating range to 0–150 °C.
With a 100 mm bore and a 25 mm piston rod, this cylinder generates a substantial 3927 N of push force at 0.5 MPa. The PT1/2 port ensures ample air flow, while the 29 mm air cushion at each end decelerates the piston for smooth, high-cycle operation. The body length A(SCJ) is 245 mm, providing a robust tie-rod construction for demanding industrial tasks.
Airtac SCJ100 Standard Cylinder SCJ100X250-50SH Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X250-50SH |
|---|---|
| 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 SCJ100X250-50SH
| 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 SCJ100X250-50SH Is Used
End-Stop Fine-Tuning
The 50 mm adjusting screw allows operators to precisely dial in the retract stroke end for tooling engagement, eliminating the need for shims or external hard stops during setup.
High-Temperature Automation
With Viton seals rated for 150 °C, this cylinder is suited for actuators near ovens, autoclaves, or foundry equipment where standard seals would degrade, and the magnet enables sensor feedback in hot zones.
Wear Take-Up in Clamping
In high-cycle clamping fixtures, the adjustable stroke compensates for jaw or pad wear over time. A quick turn of the rear screw restores full clamping force without disassembling the tooling.
Is the Airtac SCJ100 Standard Cylinder SCJ100X250-50SH the Right Cylinder?
Choose the SCJ100 when your application requires a force class around 3927 N at 0.5 MPa. If your load is lighter, stepping down to an 80 mm bore (2513 N push) can reduce air consumption. For higher force requirements, the 125 mm bore delivers 6136 N. The adjustable stroke is ideal for commissioning and format changes, but if your stroke is fixed and never needs field adjustment, a standard SC100 fixed-stroke cylinder is a more economical choice.
For this 250 mm stroke, be mindful of side loads that can cause rod bending. If your tooling applies a radial force, use an external guide rail or switch to a guided cylinder. This model is a direct replacement for another AirTAC SCJ100X250-50SH cylinder with a PT port, basic mount, magnet, and Viton seals.
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 SCJ100X250-50SH FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N (due to the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, push force reaches 7068 N. The rear adjusting screw only changes the stroke end position and does not alter the cylinder's output force.
No. Like all standard double-acting cylinders, the SCJ100X250-50SH will drift or drop if air pressure is lost or the valve is centered. The air cushion only decelerates the piston at stroke end, and the adjusting screw only sets the stroke limit. To hold a load safely without live pressure, you must add a pilot-operated check valve or an external mechanical rod lock.
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