Airtac SCJ40 Standard Cylinder SCJ40X50-10H
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X50-10H is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke50 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X50-10H
The SCJ40X50-10 brings field-adjustable stroke control to a 40 mm bore double-acting cylinder, delivering 628 N of push force at 0.5 MPa and up to 1130 N at the maximum 0.9 MPa operating pressure. The rear-cap adjusting screw provides a 10 mm shortening range, letting technicians fine-tune the stroke end position on the machine without swapping the cylinder or adding external hard stops.
Built with a 16 mm diameter piston rod and PT1/4 ports, this unit includes Viton (FKM) seals that extend the operating temperature range from 0 to 150°C, making it suitable for hot environments where standard seals would degrade. The body length A(SCJ) is 185 mm, and the adjustable air cushion decelerates the piston smoothly at the end of travel.
Airtac SCJ40 Standard Cylinder SCJ40X50-10H Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X50-10H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 10 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 SCJ40X50-10H
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ40X50-10H Is Used
Hot Press End-Stop Tuning
The 10 mm adjustment range lets operators compensate for thermal expansion of tooling in heated platen presses, maintaining consistent contact without over-travel. Viton seals handle the 0-150°C ambient.
Small-Part Assembly Fixtures
Fine-tune the insertion depth for delicate components. The 628 N push force at 0.5 MPa is well-suited for pressing bearings or bushings into housings where the final seating depth must be dialled in precisely.
Packaging Machine Format Changeover
Adjust the stroke end to accommodate different box heights or product sizes on a packaging line. The rear screw allows a quick 10 mm shift without dismounting the cylinder, reducing downtime between batches.
Is the Airtac SCJ40 Standard Cylinder SCJ40X50-10H the Right Cylinder?
Choose the SCJ40X50-10 when you need to dial in a precise stroke end point within a 10 mm window during commissioning or format changes. If your force requirement grows, stepping up to the 50 mm bore SCJ50 series provides 982 N of push force at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC40 fixed-stroke cylinder offers a simpler, more compact alternative. To replace this model, match the 40 mm bore, 50 mm nominal stroke, 10 mm adjust range, PT ports, and Viton seal; the mounting is basic, but you can add an FA front flange or LB foot bracket from the SCJ accessory set if needed.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ40X50-10H FAQ
A screw in the rear cap sets the retract stroke end position. Turning the screw shortens the effective stroke by up to 10 mm from the nominal 50 mm maximum. It adjusts only the end stop, not the cylinder's force or speed.
At 0.5 MPa, it produces 628 N pushing and 528 N pulling. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N. The pull force is lower because the 16 mm rod reduces the effective piston area on the return stroke.
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