Airtac SCJ40 Standard Cylinder SCJ40X175-30S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X175-30S 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. Ø40mm bore, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke175 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X175-30S
The SCJ40X175-30S is a 40mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 30mm of field-adjustable stroke reduction, making it ideal for commissioning fine-tuning and format changeovers. At 0.5 MPa, it delivers 628 N of push force and 528 N of pull force, with a 16mm piston rod and PT1/4 ports.
This model includes a built-in magnet, allowing direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable end-of-stroke detection. The adjustable air cushion decelerates the piston smoothly, and the body length A(SCJ) is 185mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the stroke-adjust mechanism.
Airtac SCJ40 Standard Cylinder SCJ40X175-30S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X175-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 30 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 SCJ40X175-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 SCJ40 Standard Cylinder SCJ40X175-30S Is Used
Commissioning Fine-Tuning
Adjust the stroke end in 30mm increments during initial machine setup to perfectly align the actuator with mating tooling without re-plumbing or replacing the cylinder.
Format Changeover
Quickly adapt the stroke for different product sizes on packaging or sorting lines by turning the rear screw, reducing downtime between batches.
Wear Compensation
Take up mechanical play or wear in linkages over time by extending the effective stroke slightly, maintaining consistent clamping or pressing force.
Is the Airtac SCJ40 Standard Cylinder SCJ40X175-30S the Right Cylinder?
Choose this SCJ40 when you need to dial in the stroke end position on the machine without swapping cylinders. If 628 N of push force is insufficient, stepping up to the SCJ50 series provides 982 N at the same 0.5 MPa. For applications requiring a fixed, non-adjustable stroke, the standard SC40 cylinder is a simpler alternative. This unit is a direct replacement for another AirTAC SCJ40 with a 175mm nominal stroke, 30mm adjust range, PT ports, and a magnet.
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 SCJ40 Standard Cylinder SCJ40X175-30S FAQ
At 0.5 MPa, it generates 628 N pushing and 528 N pulling. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1256 N.
Yes, if you need the 30mm stroke adjustability. The SCJ40X175-30S matches the SC40's force and mounting footprint but adds the rear adjustment screw, so ensure you have clearance for the slightly longer body length.
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