Airtac SCJ100 Standard Cylinder SCJ100X50-20
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X50-20 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 SCJ100X50-20
The SCJ100X50-20 delivers 3927 N of push force at 0.5 MPa from a 100 mm bore, with a field-adjustable stroke end that can be shortened by up to 20 mm via the rear-cap screw. This lets you fine-tune the end position without swapping the cylinder, making it practical for commissioning and format changes. The single-rod design uses a 25 mm rod and PT1/2 ports, with a 29 mm air cushion to decelerate the piston smoothly.
Body length A for this SCJ is 245 mm, slightly longer than a fixed-stroke SC of the same bore to house the adjusting mechanism. The cylinder operates on filtered air from 0.15 to 1.0 MPa and handles speeds of 30-800 mm/s. At the maximum operating pressure of 0.9 MPa, it generates 7068 N of push force, giving you a clear picture of its capacity in compact automation tasks.
Airtac SCJ100 Standard Cylinder SCJ100X50-20 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X50-20 |
|---|---|
| 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 SCJ100X50-20
| 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 SCJ100X50-20 Is Used
End-Stop Fine Tuning
Use the 20 mm adjusting screw to dial in the exact stroke end on a clamping or pressing station after the tooling is installed, eliminating the need for shims or external hard stops.
Format Changeover
On a packaging line handling multiple box sizes, the adjustable stroke lets operators quickly reset the pusher stroke end for a new format without replacing the cylinder or reprogramming a servo axis.
Wear Take-Up
In a high-cycle riveting or staking head, the screw can be advanced slightly over time to compensate for tooling wear, keeping the final set depth consistent across thousands of cycles.
Is the Airtac SCJ100 Standard Cylinder SCJ100X50-20 the Right Cylinder?
Choose the SCJ100 bore when your load needs roughly 3927 N push at standard plant air. If you can work with about 2513 N, stepping down to an 80 mm bore saves space and air consumption. For a fixed, non-adjustable stroke, the standard SC100 series is a simpler alternative; if the rod must extend from both ends, look at the SCD100 double-rod type. This model is a direct replacement for another AirTAC SCJ100X50-20 with PT ports, basic mount, and no magnet—match the bore, nominal stroke, and 20 mm adjust range exactly.
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 SCJ100X50-20 FAQ
At 0.5 MPa, push force is 3927 N and pull force is 3681 N (the pull force is lower because the 25 mm rod reduces the piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 7068 N.
Yes, if you need the 20 mm stroke-end adjustment. The SCJ100X50-20 matches the SC100 bore and nominal 50 mm stroke, but the body is slightly longer (245 mm A-length). Ensure your mounting and port connections have clearance for the rear adjusting screw.
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