Airtac SCJ100 Standard Cylinder SCJ100X40-30S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X40-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø100mm bore, 40mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke40 mm
- Stroke adjust-30 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X40-30S
The SCJ100X40-30S delivers substantial force in a compact adjustable-stroke package, generating 3927 N of push and 3681 N of pull at 0.5 MPa. Its 30 mm rear adjusting screw lets you fine-tune the stroke end position on the fly, making it ideal for heavy-duty clamping, pressing, or positioning tasks where the exact stop point needs to be dialed in during commissioning or after tooling wear.
This model features a built-in magnet, allowing CMSG/DMSG/EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The 25 mm diameter piston rod and PT1/2 ports ensure robust air flow, while the 29 mm air cushion at each end decelerates the piston smoothly, protecting the cylinder and the load from impact damage.
Airtac SCJ100 Standard Cylinder SCJ100X40-30S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X40-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 40 mm |
| Stroke adjustment | Up to 30 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 SCJ100X40-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×40 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ100X40-30S Is Used
Commissioning & Setup
The 30 mm adjustable stroke allows technicians to precisely set the end-stop for a heavy press fixture during initial machine setup without swapping out hard stops or shims.
Wear Compensation
In automated welding or riveting cells, the stroke end can be incrementally adjusted to compensate for electrode or tooling tip wear, maintaining consistent part contact without reprogramming.
Product Changeover
Quickly adapt a 100 mm bore pusher or diverter to a new product size on a packaging line by turning the rear screw, reducing downtime between production runs.
Is the Airtac SCJ100 Standard Cylinder SCJ100X40-30S the Right Cylinder?
For applications needing more force, stepping up to the 125 mm bore provides 6136 N of push at 0.5 MPa, while the 80 mm bore offers a more compact alternative at 2513 N. If your stroke length is fixed and never needs field adjustment, the standard SC100 series provides the same force ratings without the rear screw. This SCJ100X40-30S is a direct replacement for any AirTAC SCJ100 cylinder with a 40 mm nominal stroke, a 30 mm adjust range, PT ports, and a magnet; ensure the mounting style matches your existing setup. For strokes over 300 mm in this bore, consider an external guide rail to protect the rod from side-load bending.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ100X40-30S FAQ
At the standard operating pressure of 0.5 MPa, the cylinder produces 3927 N of push force and 3681 N of pull force. The maximum push force at 0.9 MPa is 7068 N. The rear adjusting screw only changes the stroke end position and does not alter these force values.
Yes, if you need the ability to fine-tune the stroke. The SCJ100X40-30S has the same bore, rod diameter, and mounting interfaces as the SC100 series but adds a 30 mm adjustable rear screw. It is a drop-in replacement dimensionally, provided your application can accommodate the slightly longer body length (A=245 mm) and you match the port thread (PT) and magnet option.
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