Airtac SCJ100 Standard Cylinder SCJ100X400-50S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X400-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø100mm bore, 400mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke400 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X400-50S
The SCJ100X400-50S is a 100 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke. Its rear-cap adjusting screw provides a 50 mm range to fine-tune the stroke end position without removing the cylinder, making it ideal for commissioning and format changeovers. With a 25 mm diameter piston rod and PT1/2 port, this model delivers a substantial 3927 N of push force at 0.5 MPa.
This unit includes a built-in magnet (-S suffix), allowing easy mounting of CMSG/DMSG/EMSG reed or solid-state sensors directly onto the tie-rod barrel for precise end-of-stroke detection. The standard TPU seals offer reliable operation from -20 to +70 °C, while the adjustable air cushion at both ends decelerates the piston smoothly, protecting the end caps during high-cycle applications.
Airtac SCJ100 Standard Cylinder SCJ100X400-50S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X400-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 400 mm |
| Stroke adjustment | Up to 50 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 SCJ100X400-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×400 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ100X400-50S Is Used
Commissioning & Setup
The 50 mm adjustment screw allows engineers to dial in the exact stroke end-stop during initial machine setup, compensating for assembly tolerances without needing to swap out the cylinder.
Product Changeover
In packaging or sorting lines, the stroke can be quickly re-adjusted to handle different product sizes, eliminating the downtime associated with changing fixed-stroke actuators.
Wear Compensation
In clamping or pressing applications, the adjustable stroke can be periodically extended to take up wear on tooling or contact surfaces, maintaining consistent process force.
Is the Airtac SCJ100 Standard Cylinder SCJ100X400-50S the Right Cylinder?
Choose the SCJ100X400-50S when you need a powerful, field-tunable actuator for a 400 mm nominal stroke. If your force requirement is lower, stepping down to an 80 mm bore reduces push force to 2513 N at 0.5 MPa; for even greater force, the 125 mm bore provides 6136 N. The adjustable stroke is a key differentiator from the fixed-stroke SC series—select the SCJ when the final stroke length must be empirically determined or may need periodic adjustment.
For strokes of 300 mm or more, be mindful of side-loading and potential rod buckling. Always guide the load externally with a linear rail or rod guide, or consider a guided cylinder if side forces are unavoidable. As a direct replacement, match this model with another AirTAC SCJ100X400-50S with a PT port, basic mounting, and the -S magnet option to ensure identical form, fit, and function.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ100X400-50S FAQ
At the standard 0.5 MPa operating pressure, this 100 mm bore cylinder generates 3927 N of push force and 3681 N of pull force (the difference is due to the 25 mm rod area). At the maximum operating pressure of 1.0 MPa, the theoretical push force is 7854 N.
You can replace a fixed-stroke SC100X400 with this SCJ100X400-50S if you need the 50 mm adjustable stroke feature. The body length A is 245 mm, which is slightly longer than the fixed-stroke version. Ensure the port thread (PT1/2), magnet option (-S), and basic mounting style match your existing setup.
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