Airtac SCJ100 Standard Cylinder SCJ100X50-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X50-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø100mm bore, 50mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke50 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X50-20S
The SCJ100X50-20S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the stop position by up to 20 mm without replacing the unit. Its 100 mm bore delivers a substantial 3927 N push force at 0.5 MPa, making it a strong candidate for pressing, clamping, and heavy-duty positioning tasks.
This model includes a built-in magnet (-S suffix), so CMSG/DMSG/EMSG reed and solid-state sensors clip directly onto the tie-rod barrel for reliable end-of-stroke detection. The cylinder body length A(SCJ) is 245 mm, and the 25 mm diameter piston rod provides the rigidity needed for consistent cycling in industrial automation.
Airtac SCJ100 Standard Cylinder SCJ100X50-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X50-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 20 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 SCJ100X50-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ100X50-20S Is Used
End-Stop Fine Tuning
The 20 mm rear adjusting screw lets commissioning engineers dial in the exact stroke end on a 100 mm bore press without machining new hard stops, saving hours during line setup.
Sensor-Controlled Clamping
With the built-in magnet, CMSG sensors confirm the clamp has reached its adjusted end position, providing a closed-loop signal for automated assembly fixtures handling large components.
Wear Compensation
On high-cycle riveting or forming tools, the adjustable stroke compensates for tooling wear over time, maintaining consistent part contact without reprogramming the machine controller.
Is the Airtac SCJ100 Standard Cylinder SCJ100X50-20S the Right Cylinder?
Choose the SCJ100 when your application needs a robust 3927 N push force class. If space is tighter and 2513 N is sufficient, the 80 mm bore SCJ80 series is a lighter alternative; for higher force, the SCJ125 delivers 6136 N push. The 20 mm rear-screw adjustment is ideal for commissioning trials or wear take-up on a fixed stop.
This is a basic-mount cylinder with PT ports. For a direct replacement, match the 100 mm bore, 50 mm nominal stroke, -20 adjust range, PT thread, and the built-in magnet. If your load creates a side force at this stroke, consider an external guide rail or switching to a guided cylinder to protect the rod bearing.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ100X50-20S FAQ
At the standard 0.5 MPa operating pressure, it generates 3927 N of push force and 3681 N of pull force. The push force is higher because the single rod reduces the effective piston area on the return stroke.
Yes, provided the bore, nominal stroke, port thread (PT), and magnet option match. The SCJ body is slightly longer to house the adjusting screw, so verify the available space. The mounting accessories from the SC series (FA, LB, TC) are compatible.
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