Airtac SCJ40 Standard Cylinder SCJ40X350-100
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X350-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø40mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke350 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X350-100
The SCJ40X350-100 brings field-adjustable stroke control to the 40 mm bore class, with a generous 100 mm adjustment range built into the rear cap. At 0.5 MPa the 16 mm single rod delivers 628 N of push force and 528 N on the pull stroke, giving you a mid-range actuator that can be dialled in precisely during commissioning or format changes.
The tie-rod body measures 185 mm (A dimension) plus stroke, and the PT1/4 port supplies air filtered to 40 µm. The rear adjusting screw sets the stroke end position anywhere within that 100 mm window—it shortens the nominal 350 mm maximum stroke without affecting the bore's force output or the integrated 21 mm air cushion that decelerates the piston near end of travel.
Airtac SCJ40 Standard Cylinder SCJ40X350-100 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X350-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Stroke adjustment | Up to 100 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCJ40 Standard Cylinder SCJ40X350-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ40 Standard Cylinder SCJ40X350-100 Is Used
Commissioning & Setup
Dial in the exact stroke end position during machine bring-up without ordering multiple fixed-stroke cylinders. The 100 mm adjust range lets you fine-tune the stopping point after the cylinder is mounted.
Format Changeovers
Quickly adapt a pusher or diverter to a new product size on a packaging line. Adjust the rear screw to shorten the stroke by up to 100 mm, eliminating the need for external hard stops.
Wear Compensation
Take up mechanical slack in linkages or tooling over time. As pads wear or fixtures shift, the adjustable stroke end lets you restore the correct working position without disassembling the actuator.
Is the Airtac SCJ40 Standard Cylinder SCJ40X350-100 the Right Cylinder?
This 40 mm bore sits between the smaller SCJ32 (402 N push at 0.5 MPa) and the larger SCJ50 (982 N push). If your load needs more than 628 N of thrust, stepping up to the 50 mm bore nearly doubles the available force. For applications that do not require stroke adjustment, the fixed-stroke SC40 series offers a simpler, lower-cost alternative with the same mounting footprint.
When replacing an existing SCJ40X350-100, match the 40 mm bore, 350 mm nominal stroke, 100 mm adjust range, PT thread, and basic mounting. Because the 350 mm stroke is well within the 1200 mm maximum for this bore, rod buckling is not a primary concern, but for off-centre loads consider adding an external guide rail or switching to a guided cylinder to protect the rod and bearing.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ40 Standard Cylinder SCJ40X350-100 FAQ
At 0.5 MPa the push force is 628 N and the pull force is 528 N (the difference is due to the 16 mm single rod reducing the piston area on the return stroke). At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N.
Yes, provided the bore (40 mm), port thread (PT1/4), and mounting style match. The SCJ40 body is slightly longer than the equivalent SC40 to house the adjusting screw, so check the A dimension (185 mm) against your available space. The adjustable stroke is a bonus—you can set it to match your existing fixed stroke and then fine-tune from there.
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