Airtac SCJ40 Standard Cylinder SCJ40X175-40S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X175-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 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-40 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X175-40S
The SCJ40X175-40S is a double-acting, single-rod pneumatic cylinder that puts stroke-end tuning directly in your hands. Its rear-cap adjusting screw provides a 40 mm field-adjustable range, letting you dial in the exact stroke end position for commissioning or format changes without swapping the cylinder. With a 16 mm diameter piston rod and PT1/4 ports, this 40 mm bore unit delivers 628 N of push force at 0.5 MPa.
This model features a built-in magnet (-S suffix), so standard CMSG/DMSG/EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing. The body length A(SCJ) is 185 mm, slightly longer than a fixed-stroke SC to house the adjustment mechanism. It operates on 40 µm filtered air from 0.15 to 1.0 MPa and includes an adjustable air cushion for smooth deceleration.
Airtac SCJ40 Standard Cylinder SCJ40X175-40S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X175-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 40 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 SCJ40X175-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×175 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ40X175-40S Is Used
Commissioning & Debugging
Fine-tune the stroke end position on a new assembly line without draining the air system or removing the cylinder. The 40 mm adjustment screw lets technicians quickly dial in the perfect actuator throw during initial machine setup.
Product Format Changeover
Adjust the pusher stroke on a packaging conveyor when switching between product sizes. The SCJ40X175-40S eliminates the need to stock multiple fixed-stroke cylinders for different box or carton widths.
Wear Take-Up in Clamping
Compensate for jaw or pad wear in a pneumatic clamping fixture. The 40 mm adjustment range allows operators to periodically advance the stroke end, maintaining consistent clamping force without replacing consumable tooling.
Is the Airtac SCJ40 Standard Cylinder SCJ40X175-40S the Right Cylinder?
Step up to a 50 mm bore SCJ if your application demands more than the 628 N push force this 40 mm unit provides at 0.5 MPa; the SCJ50 delivers 982 N. For purely fixed-stroke tasks where no field adjustment is ever needed, the standard SC series offers a simpler, more compact alternative. When replacing this cylinder, match the 40 mm bore, 175 mm nominal stroke, 40 mm adjust range, PT port thread, and the built-in magnet configuration to ensure identical mechanical and sensing compatibility. At 175 mm of stroke, rod deflection is minimal for most inline loads, but if you are pushing an offset or unguided mass, consider an external guide rail to protect the rod and bearing from side-load wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ40X175-40S FAQ
At the standard operating pressure of 0.5 MPa, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. The pull force is lower because the 16 mm piston rod reduces the effective piston area on the return stroke.
No. The SCJ40X175-40S is a double-acting cylinder that will drift or drop if air pressure is lost or the control valve is centered. The stroke-adjusting screw only sets the end position and does not act as a mechanical lock. For mid-stroke holding, you need an external rod brake or a pilot-operated check valve.
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