Airtac SCJ250 Standard Cylinder SCJ250X100-10S
The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X100-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø250mm bore, 100mm nominal stroke, PT1" ports and adjustable end cushioning.
- BoreØ250 mm
- Nominal stroke100 mm
- Stroke adjust-10 mm
- Port sizePT1"
- Rod threadM42×2
- CushionAdjustable, 40 mm
About the Airtac SCJ250 Standard Cylinder SCJ250X100-10S
The SCJ250X100-10S is a large-bore, single-rod double-acting cylinder from AirTAC, engineered with a rear-cap adjusting screw that delivers up to 10 mm of field-adjustable stroke-end retraction. This lets commissioning engineers dial in the precise end position on heavy-duty tooling without replacing the cylinder or adding external hard stops. With a 250 mm bore and 50 mm piston rod, it generates a substantial 24544 N of push force at just 0.5 MPa, rising to 44178 N at the maximum operating pressure of 0.9 MPa.
This ISO 6430 class tie-rod cylinder features a built-in magnet (denoted by the -S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for reliable end-of-stroke detection. The body length A(SCJ) is 409 mm, and it uses a 1-inch PT port with an M42x2 rod thread. The adjustable air cushion, with a 40 mm cushion length, decelerates the massive piston smoothly, making it a robust choice for pressing, clamping, and material handling applications where stroke fine-tuning is critical.
Airtac SCJ250 Standard Cylinder SCJ250X100-10S Technical Specifications
| Model | Airtac SCJ250 Standard Cylinder SCJ250X100-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1" |
| Rod thread | M42×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø250mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 24544 N | 23562 N |
| 0.7 MPa | 34361 N | — |
| Max (@1.0 MPa) | 5006 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 SCJ250 Standard Cylinder SCJ250X100-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 250 | Bore size in mm. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ250 Standard Cylinder SCJ250X100-10S Is Used
Heavy-Duty Press Stroke Tuning
The 10 mm rear adjustment screw allows operators to fine-tune the final pressing depth of a 250-bore cylinder on a hydraulic-style pneumatic press, ensuring consistent part compression without reprogramming the machine controller.
Large-Format Clamp Positioning
Ideal for adjusting the clamping point on large weld fixtures or assembly jigs. The adjustable stroke compensates for variations in workpiece thickness or fixture wear over time, maintaining consistent clamping force.
Material Handling End-Stop Calibration
In lumber or steel sheet handling, the SCJ250X100-10S can be used to push material onto a conveyor. The 10 mm adjustability lets maintenance staff quickly recalibrate the pusher's end-stop position after mechanical adjustments to the line.
Is the Airtac SCJ250 Standard Cylinder SCJ250X100-10S the Right Cylinder?
Select the SCJ250X100-10S when your application demands the highest force class in the SCJ range and requires a 10 mm stroke-end adjustment for setup or wear compensation. If 24544 N of push force at 0.5 MPa is more than needed, stepping down to the 200 mm bore SCJ200 series reduces the push force to 15708 N at the same pressure, offering a lighter and more compact package. This model is a direct replacement for any AirTAC SCJ250X100-10S cylinder with a PT port and built-in magnet; ensure the adjustable range, nominal stroke, and sensor compatibility match your existing setup.
For a 100 mm stroke, rod deflection is generally not a primary concern on this rigid 50 mm rod, but for applications with significant off-axis loading, pairing the cylinder with an external linear guide or switching to a guided cylinder assembly is recommended. If your process does not require stroke adjustability, the fixed-stroke SC250X100 is a simpler, more cost-effective alternative.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ250 Standard Cylinder SCJ250X100-10S FAQ
At the standard 0.5 MPa operating pressure, the cylinder provides 24544 N of push force and 23562 N of pull force. The maximum push force at 0.9 MPa is 44178 N. The pull force is lower due to the area of the 50 mm piston rod.
The rear-cap adjusting screw shortens the stroke end by up to 10 mm, allowing you to set the piston's final position. It directly replaces another SCJ250X100-10S with a PT port and magnet. It can replace a fixed-stroke SC250X100 if you need the fine-tuning capability, but the SCJ body is slightly longer to accommodate the adjusting mechanism.
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