Airtac SCJ100 Standard Cylinder SCJ100X550-100S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X550-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø100mm bore, 550mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke550 mm
- Stroke adjust-100 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X550-100S
The SCJ100X550-100S is a tie-rod, double-acting, single-rod pneumatic cylinder with a 100 mm bore and a nominal 550 mm stroke. Its defining feature is the rear-cap adjusting screw, which provides a 100 mm field-adjustable range to fine-tune the stroke end position without replacing the cylinder. This model delivers a substantial 3927 N push force at 0.5 MPa, making it a powerful actuator for heavy-duty positioning tasks.
This specific configuration includes a built-in magnet (-S suffix), allowing for direct mounting of CMSG/DMSG/EMSG sensors along the barrel for precise, non-contact end-of-stroke detection. The cylinder uses a 25 mm diameter piston rod, PT 1/2 port threads, and has a 29 mm air cushion to decelerate the piston smoothly. With a body length A of 245 mm, it is a robust solution for applications where the final stopping point must be dialed in during commissioning or changeovers.
Airtac SCJ100 Standard Cylinder SCJ100X550-100S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X550-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 550 mm |
| Stroke adjustment | Up to 100 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 SCJ100X550-100S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×550 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ100X550-100S Is Used
Commissioning & Process Ramping
The 100 mm adjustment screw allows technicians to precisely dial in the final stop position of a heavy press or clamping mechanism during initial setup, avoiding hard stops and reducing commissioning time.
Format Changeovers on Packaging Lines
Quickly adapt the stroke of a pusher arm for different box or pallet sizes on a packaging line by adjusting the rear screw, eliminating the need to swap out a 550 mm cylinder for a different length.
Wear Compensation in Material Handling
In high-cycle pick-and-place systems, the adjustable stroke can compensate for mechanical wear in grippers or linkages over time, maintaining precise placement without reprogramming the controller.
Is the Airtac SCJ100 Standard Cylinder SCJ100X550-100S the Right Cylinder?
Select this 100 mm bore SCJ when your application requires a heavy push force of 3927 N at standard plant pressure and the flexibility of a 100 mm stroke-end adjustment. If your force requirement is lower, stepping down to an 80 mm bore SCJ reduces push force to 2513 N at 0.5 MPa, potentially saving on air consumption and physical space. For a fixed, non-adjustable stroke, the standard SC100X550 cylinder is a simpler alternative.
For this 550 mm stroke length, be mindful of side-loading on the 25 mm rod. If the load is not guided externally, rod bending and premature seal wear can occur. In such cases, use an external guide rail or switch to a guided cylinder. This model is a direct replacement for another AirTAC SCJ100X550-100S cylinder with a PT port, basic mount, and magnet. Mounting accessories from the SCJ subset, like the FA front flange (F-SC100FA) or LB foot mount (F-SC100LB), can be added separately.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ100X550-100S FAQ
The theoretical push force at 0.5 MPa is 3927 N, and the pull force on the rod side is 3681 N. At the maximum operating pressure of 1.0 MPa, the push force reaches 7854 N. These values are identical to the fixed-stroke SC100 series.
No. The SCJ cylinder is not designed for position holding. If air pressure is lost or the directional valve is centered, the piston will drift or drop. The rear adjusting screw only sets the end-of-stroke position and is not a mechanical lock. For load holding, you must add an external rod brake or a pilot-operated check valve.
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