Airtac SCJ32 Standard Cylinder SCJ32X400-20S
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X400-20S 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 SCJ32X400-20S
The SCJ32X400-20S provides a field-adjustable stroke end within a 20 mm range, letting you fine-tune the piston stop without swapping the cylinder. With a 12 mm rod and M10x1.25 knuckle thread, it delivers 402 N of push force at 0.5 MPa, scaling up to 724 N at the 0.9 MPa maximum operating pressure.
This model includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for precise end-of-stroke detection. The 21 mm air cushion at each end decelerates the piston smoothly, and the PT1/8 ports keep the footprint compact for space-constrained automation cells.
Airtac SCJ32 Standard Cylinder SCJ32X400-20S Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X400-20S |
|---|---|
| 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 SCJ32X400-20S
| 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 SCJ32X400-20S Is Used
Commissioning Fine-Tuning
Adjust the stroke end in 20 mm increments during machine setup to achieve perfect alignment with mating parts, eliminating the need for shims or external hard stops.
Wear Compensation
On a packaging line, take up mechanical slack from worn gripper pads by slightly extending the stroke via the rear screw, maintaining consistent product handling without downtime.
Format Changeover
Quickly adapt the cylinder stroke for different product sizes on a small assembly jig, using the sensor-ready magnet to confirm the new end position on every cycle.
Is the Airtac SCJ32 Standard Cylinder SCJ32X400-20S the Right Cylinder?
Choose the SCJ32X400-20S when you need to dial in a precise stroke end during commissioning or after tooling wear. If 402 N of push force is marginal, stepping up to the 40 mm bore provides 628 N at the same pressure. For applications where the stroke never needs adjustment, the fixed-stroke SC32X400 is a simpler, lower-cost alternative. A direct replacement must match the 32 mm bore, 400 mm nominal stroke, 20 mm adjust range, PT ports, and the integrated magnet.
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 SCJ32X400-20S FAQ
At 0.5 MPa, the push force is 402 N and the pull force is 345 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 724 N. The single-rod design means push force is always greater than pull force.
A rear-cap screw lets you shorten the stroke end by up to 20 mm without changing the cylinder's nominal 400 mm rating. The built-in magnet (-S suffix) allows AirTAC CMSG/DMSG/EMSG sensors to clamp directly onto the barrel for electronic end-of-stroke confirmation.
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