Airtac SCJ100 Standard Cylinder SCJ100X250-50S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X250-50S 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 SCJ100X250-50S
The SCJ100X250-50S is a double-acting, single-rod pneumatic cylinder with a 100 mm bore and a 250 mm nominal stroke, featuring a rear-cap adjusting screw that provides a 50 mm field-adjustable range for the stroke end. This model includes a built-in magnet, allowing direct mounting of CMSG/DMSG/EMSG sensors for precise, non-contact end-of-stroke detection. At 0.5 MPa, it delivers a push force of 3927 N and a pull force of 3681 N, making it a powerful choice for heavy-duty positioning tasks.
With a 25 mm diameter piston rod and a PT1/2 port, the SCJ100X250-50S is built for robust, repeatable performance. The adjustable stroke end is invaluable for commissioning new machinery, accommodating format changes, or taking up mechanical wear without replacing the cylinder. The standard TPU seal ensures reliable operation within a -20 to +70 °C temperature range, while the 29 mm air cushion at each end provides smooth deceleration for the moving mass.
Airtac SCJ100 Standard Cylinder SCJ100X250-50S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X250-50S |
|---|---|
| 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 SCJ100X250-50S
| 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 SCJ100X250-50S Is Used
Commissioning & Process Setup
During initial machine setup, the 50 mm adjustment range allows engineers to dial in the exact stroke end for a 250 mm movement, achieving perfect alignment with other tooling without needing to swap out the cylinder for a different stroke length.
Product Changeover on Packaging Lines
When a packaging line switches between product sizes, the adjustable stroke lets operators quickly reposition a stop gate or pusher arm. The built-in magnet provides sensor feedback to the PLC, confirming the new position for each format.
Wear Compensation in Clamping Fixtures
In high-cycle clamping applications, the 50 mm adjustment can be used to periodically take up slack caused by wear on the clamped part or fixture pads, maintaining consistent clamping force without replacing the actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X250-50S the Right Cylinder?
Select the SCJ100X250-50S when you need a high-force actuator with the flexibility to fine-tune the stroke end position on the machine. If your application requires even greater force, consider stepping up to the 125 mm bore SCJ, which provides 6136 N of push force at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC100X250 fixed-stroke cylinder is a more economical alternative.
For a direct replacement, match the 100 mm bore, 250 mm nominal stroke, and the 50 mm adjustment range (-50). This model has a built-in magnet (S suffix), a basic mounting style, a TPU seal, and PT port threads. Given the 250 mm stroke, ensure the load is guided to prevent excessive side-loading on the rod bearing; if the application involves an unguided mass, consider adding an external guide rail or switching to a guided cylinder assembly.
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 SCJ100X250-50S FAQ
At the standard operating pressure of 0.5 MPa, this cylinder provides a push force of 3927 N and a pull force of 3681 N. The pull force is lower due to the area of the 25 mm piston rod. The maximum push force at the 0.9 MPa operating limit is 7068 N.
Yes, for a direct physical and functional replacement, the new cylinder must match the 100 mm bore, 250 mm nominal stroke, and the 50 mm adjustable range. It must also have the same port thread (PT), a built-in magnet (S), and the same mounting type. This ensures the stroke adjustment range and sensor interface are identical.
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