Airtac SCJ32 Standard Cylinder SCJ32X400-20
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X400-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø32mm bore, 400mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke400 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X400-20
The SCJ32X400-20 is a 32 mm bore double-acting, single-rod cylinder with a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 402 N push and 345 N pull, scaling to 724 N push at the maximum operating pressure of 0.9 MPa, making it a compact yet capable actuator for light-to-medium automation tasks.
The 12 mm diameter piston rod and PT1/8 ports are housed in a tie-rod body with a 21 mm air cushion and a body length A of 182 mm. The 400 mm nominal stroke is well within the 1000 mm maximum standard stroke for this bore, and the adjustable screw lets commissioning engineers dial in the exact end position on the machine without external hard stops.
Airtac SCJ32 Standard Cylinder SCJ32X400-20 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X400-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 400 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 SCJ32 Standard Cylinder SCJ32X400-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×400 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ32 Standard Cylinder SCJ32X400-20 Is Used
Commissioning & Setup
The 20 mm adjusting screw allows technicians to fine-tune the stroke end position during machine commissioning, eliminating the need to shim or reposition the cylinder body.
Format Changeovers
On packaging or assembly lines, quickly adjust the push stroke for different product sizes or pallet formats without changing the actuator or adding mechanical stops.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear over time, maintaining consistent end-of-stroke pressure without reprogramming.
Is the Airtac SCJ32 Standard Cylinder SCJ32X400-20 the Right Cylinder?
Step up to the 40 mm bore SCJ if your application requires more than the 724 N push force this 32 mm unit provides at 0.9 MPa; the SCJ40 delivers 1130 N push at the same pressure. For applications where the stroke length is fixed and will never need field adjustment, the standard SC32 fixed-stroke cylinder is a simpler, cost-effective alternative. This SCJ32X400-20 is a direct dimensional replacement only for another AirTAC SCJ32 with a 400 mm nominal stroke and a 20 mm adjust range, matching PT ports and basic mounting. At 400 mm of stroke, ensure the rod is adequately supported against side loads; if the load is not guided externally, consider adding an external guide rail or switching to a guided cylinder.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ32 Standard Cylinder SCJ32X400-20 FAQ
The push force depends on your air pressure. At 0.5 MPa it produces 402 N, at 0.7 MPa it reaches 563 N, and at the maximum operating pressure of 0.9 MPa it delivers 724 N. Pull force is lower due to the single rod, providing 345 N at 0.5 MPa.
A screw in the rear end-cap limits how far the piston can retract, effectively shortening the stroke end by up to 20 mm from the nominal 400 mm. It does not change the cylinder's force or speed, only the retracted end position, and is designed for fine-tuning, not as a primary stop.
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