Airtac SCJ100 Standard Cylinder SCJ100X25-20TC
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X25-20TC 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, 25mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke25 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X25-20TC
The SCJ100X25-20TC is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw, allowing the stroke end position to be fine-tuned by up to 20 mm without replacing the unit. With a 100 mm bore and 25 mm nominal stroke, it delivers a substantial 3927 N of push force at 0.5 MPa, making it suitable for heavy-duty clamping and positioning tasks where final placement must be dialed in precisely on the machine.
This model features a TC centre trunnion mount (supplied with the TCM1 bracket, order code F-SC100TC) for pivoting applications, and uses a 25 mm piston rod with PT1/2 ports. The built-in adjustable air cushion, with a 29 mm cushion length, ensures smooth deceleration, while the tie-rod construction provides robust, serviceable operation.
Airtac SCJ100 Standard Cylinder SCJ100X25-20TC Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X25-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 25 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 SCJ100X25-20TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SCJ100X25-20TC Is Used
End-Stop Calibration
Dial in the precise stopping point for a heavy workpiece clamp during commissioning, using the 20 mm adjustment range to compensate for fixture tolerances without needing shims.
Product Changeover
Quickly adapt a pneumatic pusher or diverter on a conveyor line to handle different product widths, adjusting the stroke end by up to 20 mm to suit a new format.
Wear Compensation
Extend the effective stroke by a few millimeters over the machine's life to compensate for wear on a mechanical stop or tooling tip, maintaining consistent process quality.
Is the Airtac SCJ100 Standard Cylinder SCJ100X25-20TC the Right Cylinder?
Choose the SCJ100X25-20TC when your application requires a powerful, field-adjustable end stop within a compact 25 mm nominal stroke. If you need more force, stepping up to the 125 mm bore provides 6136 N of push force at the same pressure. For applications where the stroke length is fixed and never needs adjustment, a standard SC100X25 fixed-stroke cylinder offers a simpler, more cost-effective solution. A direct replacement must match the 100 mm bore, 25 mm nominal stroke, 20 mm adjustable range, PT port thread, and TC trunnion mounting configuration.
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 SCJ100X25-20TC FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. The maximum push force at the 0.9 MPa operating limit is 7068 N. The pull force is lower because the 25 mm piston rod reduces the effective area on the return stroke.
Yes, if you need the 20 mm stroke-end adjustability. The SCJ100X25-20TC shares the same bore, rod size, and mounting interfaces as an SC100. Ensure your mounting style matches; this model uses a TC centre trunnion, so your machine must be set up for a pivoting cylinder.
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