Airtac SCJ100 Standard Cylinder SCJ100X400-20
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X400-20 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, 400mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke400 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X400-20
The SCJ100X400-20 is a double-acting single-rod tie-rod cylinder that delivers a robust 3927 N push at 0.5 MPa, making it a strong choice for pressing, clamping, and material-handling tasks. Its rear-cap adjusting screw lets you shorten the stroke end by up to 20 mm on the machine, so commissioning engineers can dial in the exact stop position without swapping cylinders or fabricating external hard stops.
This 100 mm bore model uses a 25 mm piston rod, PT1/2 ports, and a 29 mm air cushion to decelerate the load smoothly. The body length A(SCJ) is 245 mm, and the standard stroke range extends to 1500 mm, giving you plenty of room to specify longer travels when needed.
Airtac SCJ100 Standard Cylinder SCJ100X400-20 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X400-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 400 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 SCJ100X400-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SCJ100X400-20 Is Used
Commissioning & Setup
Fine-tune the end position during machine bring-up without cutting or shimming. The 20 mm screw adjustment lets you compensate for fixture tolerances and get the stroke exactly right before full production.
Format Changeover
When a packaging line switches between box sizes, the adjustable stroke lets operators quickly reset the pusher or stop position. No need to keep multiple fixed-stroke cylinders in stock for each format.
Wear Take-Up
As gripper pads or tooling wear down over thousands of cycles, the rear screw can be advanced to restore the original contact point. This extends tooling life and reduces unplanned downtime.
Is the Airtac SCJ100 Standard Cylinder SCJ100X400-20 the Right Cylinder?
Step up to the 125 mm bore SCJ if your application demands more than the 3927 N push this 100 mm unit provides at 0.5 MPa—the 125 bore delivers 6136 N at the same pressure. If you never need to fine-tune the stroke after installation, the fixed-stroke SC100X400 is a simpler, slightly shorter alternative. For a drop-in replacement, match the 100 mm bore, 400 mm nominal stroke, 20 mm adjust range, PT thread, and basic mounting; if your original unit carried a magnet, order the -S variant. At 400 mm of stroke, watch for side loads—consider an external guide rail or a guided cylinder if the rod sees off-axis forces.
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 SCJ100X400-20 FAQ
At 0.5 MPa, push force is 3927 N and pull force is 3681 N (the pull is lower because the 25 mm rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 0.9 MPa, push force reaches 7068 N.
Yes, provided the old cylinder is also a 100 mm bore, 400 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting. If your old unit had a magnet for sensors, order SCJ100X400-20S. The tie-rod body length A(SCJ) of 245 mm should be checked against your available space.
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