Airtac SCJ100 Standard Cylinder SCJ100X50-20H
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X50-20H 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 SCJ100X50-20H
The SCJ100X50-20H is a 100 mm bore, double-acting, single-rod pneumatic cylinder with a 50 mm nominal stroke and a 20 mm rear adjusting screw for fine-tuning the stroke end. Built with high-temperature Viton (FKM) seals, it operates reliably from 0 to +150°C, making it suitable for hot environments where standard seals would degrade. At 0.5 MPa, it delivers 3927 N of push force and 3681 N of pull force, with a 25 mm diameter piston rod and PT1/2 ports.
This tie-rod cylinder features an adjustable air cushion for smooth deceleration and a body length A of 245 mm. The stroke-end screw allows operators to dial in the exact stop position on the machine without swapping the cylinder, ideal for commissioning new tooling or compensating for wear. It is a genuine AirTAC unit, ensuring consistent performance and parts interchangeability with your existing SCJ series equipment.
Airtac SCJ100 Standard Cylinder SCJ100X50-20H Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X50-20H |
|---|---|
| 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 SCJ100X50-20H
| 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 SCJ100X50-20H Is Used
Hot Press Actuation
The Viton seals allow this cylinder to operate in presses, autoclaves, or drying ovens where ambient temperatures reach up to 150°C, with the 20 mm adjustment used to set precise platen closure.
High-Force Clamping
Delivers nearly 4000 N of clamping force at 0.5 MPa. The adjustable stroke end is perfect for fine-tuning clamp pressure on varying workpiece thicknesses in a welding or assembly fixture.
Conveyor Stop Adjustment
Used as a heavy-duty product stop on a conveyor line, the rear screw provides quick, tool-free adjustment of the stop position during product changeovers, without needing to remount the cylinder.
Is the Airtac SCJ100 Standard Cylinder SCJ100X50-20H the Right Cylinder?
Choose the SCJ100X50-20H when you need a robust, field-adjustable stroke end in a high-temperature application. If 3927 N of push force at 0.5 MPa is more than required, stepping down to a 80 mm bore SCJ provides 2513 N. For applications needing a fixed, non-adjustable stroke, a standard SC100X50 cylinder is a simpler, more cost-effective alternative. This model is a direct replacement for any AirTAC SCJ100X50-20H cylinder with PT ports and Viton seals.
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 SCJ100X50-20H FAQ
At 0.5 MPa operating pressure, the push force is 3927 N and the pull force is 3681 N. The pull force is lower due to the area of the 25 mm rod. The maximum push force at 0.9 MPa is 7068 N.
A screw in the rear cap sets the stroke end position. You can shorten the 50 mm nominal stroke by up to 20 mm. This allows for on-machine fine-tuning of the piston's stopping point without changing the cylinder or adding external hard stops.
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