Airtac SCJ100 Standard Cylinder SCJ100X225-40S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X225-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø100mm bore, 225mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke225 mm
- Stroke adjust-40 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X225-40S
The SCJ100X225-40S is a double-acting, single-rod tie-rod cylinder with a rear-cap adjusting screw that provides up to 40 mm of field-adjustable stroke-end control, letting you fine-tune the 225 mm nominal stroke without swapping the unit. Its 100 mm bore delivers 3927 N of push force at 0.5 MPa (7068 N at 0.9 MPa), driven by a 25 mm diameter piston rod through PT1/2 ports, making it a robust choice for heavy-duty positioning tasks.
This model includes a built-in magnet (suffix -S), 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 245 mm, and the adjustable air cushion decelerates the piston smoothly at both ends, with a 29 mm cushion length to absorb kinetic energy in high-cycle applications.
Airtac SCJ100 Standard Cylinder SCJ100X225-40S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X225-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 40 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 SCJ100X225-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ100X225-40S Is Used
Format Changeover Stops
Packaging or filling lines that switch between product sizes use the 40 mm adjust screw to quickly dial in a new end-stop position, eliminating the need for mechanical hard stops and reducing changeover time.
Press-Fit Depth Calibration
In assembly presses, the adjustable stroke lets technicians fine-tune the insertion depth during commissioning or after tooling wear, maintaining consistent 3927 N push force at 0.5 MPa without reprogramming the controller.
Diverter Gate Positioning
A heavy diverter gate on a conveyor can be set to open a precise distance by adjusting the stroke end, and the built-in magnet provides sensor feedback to confirm the gate is fully retracted or extended.
Is the Airtac SCJ100 Standard Cylinder SCJ100X225-40S the Right Cylinder?
Step up to the SCJ125 if your force requirement exceeds the 3927 N push this 100 mm bore offers at 0.5 MPa—the 125 mm bore provides 6136 N. For applications where the stroke never needs field adjustment, the fixed-stroke SC100 series is a simpler, slightly shorter alternative. When replacing an existing unit, match the 100 mm bore, 225 mm nominal stroke, 40 mm adjust range, PT port thread, and the built-in magnet; this model uses the basic mounting style, so if your current cylinder has a foot or trunnion bracket, order the corresponding F-SC100 accessory separately.
At a 225 mm stroke, side-load forces can cause rod bending or premature bearing wear if the load is not guided. If your application applies any radial force, pair this cylinder with an external linear guide or consider a guided cylinder to protect the rod and seals.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ100X225-40S FAQ
A screw in the rear cap acts as an internal mechanical stop for the piston. Turning the screw changes the retracted end position by up to 40 mm, effectively shortening the stroke from the nominal 225 mm down to 185 mm. It does not alter the cylinder's force or speed, only where the piston stops.
No. Like all standard double-acting pneumatic cylinders, the SCJ100X225-40S will drift or drop if supply pressure is exhausted or the directional valve is centered. The air cushion only decelerates the piston near stroke end; it is not a locking or holding brake. For load holding without live pressure, you must add an external rod lock or a pilot-operated check valve.
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