Airtac SCJ100 Standard Cylinder SCJ100X300-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X300-20S 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, 300mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke300 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X300-20S
The SCJ100X300-20S is a double-acting, single-rod tie-rod cylinder that puts fine stroke-end tuning directly on the machine. Its rear-cap adjusting screw provides a 20 mm field-adjustable range, letting you dial in the exact end position without swapping the cylinder or adding external hard stops. The built-in magnet allows CMSG/DMSG/EMSG sensors to clamp directly onto the barrel for reliable, non-contact position sensing.
With a 100 mm bore, this unit delivers 3927 N of push force at 0.5 MPa and up to 7068 N at the maximum operating pressure of 0.9 MPa. The 25 mm rod, PT1/2 ports, and 29 mm air cushion handle a 300 mm nominal stroke with authority, while the body length A(SCJ) of 245 mm keeps the package compact for its force class. It is a practical choice for heavy-duty applications where commissioning tweaks or format changeovers demand a stroke you can fine-tune on the fly.
Airtac SCJ100 Standard Cylinder SCJ100X300-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X300-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 300 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 SCJ100X300-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SCJ100X300-20S Is Used
Commissioning & Setup
The 20 mm rear adjustment screw lets commissioning engineers dial in the exact stroke end position on a new machine without fabricating custom stops, cutting cycle time during runoff.
Format Changeover
On packaging or palletizing lines, operators can quickly re-set the push-off stroke for different box or pallet sizes, reducing changeover downtime with a simple wrench adjustment.
Wear Compensation
In high-cycle clamping or pressing fixtures, the adjustable stroke end can be periodically tweaked to compensate for tooling or pad wear, maintaining consistent clamp force without replacing the cylinder.
Is the Airtac SCJ100 Standard Cylinder SCJ100X300-20S the Right Cylinder?
Choose the SCJ100 bore when your application needs the 3927 N push force at 0.5 MPa that this 100 mm frame provides. If you can drop to 2513 N, the smaller SCJ80 saves space and weight; if you need 6136 N, step up to the SCJ125. The 20 mm adjustable stroke range is ideal for taking up tolerance stack, setting a precise end stop, or accommodating minor wear over a long production run.
For a 300 mm stroke, be mindful of side-loading and rod deflection. If the load is not guided externally, consider pairing this cylinder with an external linear guide or switching to a guided cylinder to protect the rod and bearing. When replacing an existing unit, match the 100 mm bore, 300 mm nominal stroke, 20 mm adjust range, PT port thread, 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 (-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 SCJ100X300-20S FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N (the difference is due to the single rod). At the maximum operating pressure of 0.9 MPa, push force reaches 7068 N. Always size your cylinder using the pull force if the rod is under tension.
A rear-cap adjusting screw lets you shorten the stroke end by up to 20 mm in the field. Pick the SCJ when you need to fine-tune the end position during commissioning, for format changes, or to take up wear—without changing the cylinder. If your stroke is fixed and never needs adjustment, the standard SC series is a simpler, cost-effective alternative.
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