Airtac SCJ40 Standard Cylinder SCJ40X175-30
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X175-30 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 SCJ40X175-30
The SCJ40X175-30 is a double-acting, single-rod adjustable-stroke cylinder that puts stroke-end fine-tuning directly on the machine. With a 40 mm bore and a 175 mm nominal stroke, the rear adjusting screw provides up to 30 mm of field adjustment, letting you dial in the exact end position during commissioning or format changes. Its 16 mm diameter rod and PT1/4 port deliver a push force of 628 N at 0.5 MPa, rising to 1130 N at 0.9 MPa.
At 185 mm body length, this tie-rod cylinder fits where fixed-stroke units need external stops. The adjustable cushion decelerates the piston smoothly, and the screw simply sets the stroke end—it does not alter force or speed. This genuine AirTAC SCJ is built for iterative setup workflows.
Airtac SCJ40 Standard Cylinder SCJ40X175-30 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X175-30 |
|---|---|
| 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 SCJ40X175-30
| 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 SCJ40X175-30 Is Used
Commissioning Fine-Tuning
Dial in the exact end-stop position during initial machine setup without fabricating custom shims or hard stops, saving hours of mechanical adjustment.
Format Changeover
Quickly adapt the stroke for different product sizes on packaging or sorting lines. The 30 mm rear adjustment handles multiple SKUs with one cylinder part number.
Wear Compensation
Take up mechanical play or seal wear over time by advancing the stroke end, maintaining consistent clamping or positioning force without replacing the actuator.
Is the Airtac SCJ40 Standard Cylinder SCJ40X175-30 the Right Cylinder?
Choose the SCJ40X175-30 when you need to fine-tune the retract end position by up to 30 mm without changing the cylinder. If your load requires more force, step up to the 50 mm bore SCJ, which provides 982 N of push at 0.5 MPa. For applications needing a fixed, non-adjustable stroke, the standard SC40X175 is the direct alternative. When replacing an existing unit, match the 40 mm bore, 175 mm nominal stroke, 30 mm adjust range, PT1/4 port thread, and basic mounting configuration. For strokes over 300 mm, consider an external guide to manage potential rod bending under side loads.
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 SCJ40X175-30 FAQ
At 0.5 MPa operating pressure, the push force is 628 N and the pull force is 528 N due to the 16 mm rod. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N.
A rear-cap adjusting screw lets you shorten the stroke end by up to 30 mm. The 175 mm nominal stroke is the maximum; you can reduce it in the field without disassembling the cylinder or adding external stops.
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