Airtac SCJ40 Standard Cylinder SCJ40X100-50
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke100 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X100-50
The SCJ40X100-50 is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end tuning directly into the rear cap. With a 40 mm bore and a 50 mm adjustable range, you can dial in the exact end position on the fly—no need to swap cylinders or add external hard stops during commissioning or format changes. At 0.5 MPa it delivers 628 N of push force, and the 16 mm piston rod provides solid rigidity for pick-and-place and light clamping tasks.
The rear adjusting screw shortens the nominal 100 mm stroke by up to 50 mm, letting you compensate for wear or fine-tune the stopping point without disassembling the machine. The body length A(SCJ) is 185 mm, and the integrated air cushion (21 mm) decelerates the piston quietly. This model uses the default TPU seal, PT1/4 port thread, and basic mounting—ready to accept the SCJ mounting subset when your layout requires it.
Airtac SCJ40 Standard Cylinder SCJ40X100-50 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 50 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 SCJ40X100-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ40X100-50 Is Used
Commissioning & Prototyping
Adjust the stroke end by up to 50 mm during initial machine bring-up to dial in the perfect actuator timing without cutting guide rails or repositioning sensors.
Multi-Product Format Changeover
Quickly reset the cylinder's end stop between batches on a packaging or assembly line, accommodating different box heights or part sizes with a simple screw adjustment.
Wear Compensation
As gripper pads or tooling tips wear down over thousands of cycles, advance the stroke end slightly to maintain consistent contact pressure and part placement accuracy.
Is the Airtac SCJ40 Standard Cylinder SCJ40X100-50 the Right Cylinder?
Choose the SCJ40X100-50 when you need a mid-range force cylinder with the ability to tweak the stroke end after installation. If your application demands more push, stepping up to the 50 mm bore (SCJ50) provides 982 N at the same 0.5 MPa, while a step down to the 32 mm bore (SCJ32) offers 402 N for lighter, more compact designs. The adjustable stroke is ideal for prototype builds and multi-product lines, but if your stroke is permanently fixed and you want a lower-cost option, the standard SC40X100 fixed-stroke cylinder is the direct alternative.
For a drop-in replacement, match the 40 mm bore, 100 mm nominal stroke, 50 mm adjust range, and PT1/4 port thread. This cylinder accepts the SCJ mounting subset: FA front flange (F-SC40FA), LB foot mount (F-SC40LB), or TC centre trunnion with TCM1 bracket (F-SC40TC). The basic body style fits where no additional bracket is needed.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ40X100-50 FAQ
At 0.5 MPa the push force is 628 N and the pull force is 528 N (the rod reduces the piston area on the return stroke). At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The adjustable screw changes only the stroke end position, not the force.
Yes, provided the bore (40 mm), nominal stroke (100 mm), and adjust range (50 mm) match. Also confirm the port thread (this is PT) and mounting style. If your old cylinder had a magnet, order SCJ40X100-50S; for a G-thread version, specify SCJ40X100-50G.
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