Airtac SCJ32 Standard Cylinder SCJ32X40-20
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X40-20 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, 40mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke40 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X40-20
The SCJ32X40-20 is a 32 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap screw lets you shorten the effective stroke by up to 20 mm, making it ideal for commissioning trials and format changeovers where the exact stop position must be dialled in on the machine. The 12 mm rod and PT1/8 ports keep the package compact for light automation tasks.
At 0.5 MPa this cylinder delivers 402 N of push force and 345 N on the pull stroke. The body length A(SCJ) is 182 mm, and the unit includes an adjustable air cushion to decelerate the piston smoothly. It is a genuine AirTAC tie-rod cylinder built for filtered air at 0.15–1.0 MPa and temperatures from -20 to +70 °C.
Airtac SCJ32 Standard Cylinder SCJ32X40-20 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X40-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 40 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 SCJ32X40-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×40 | 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 SCJ32X40-20 Is Used
Commissioning & Setup
Dial in the exact end-of-stroke position during machine commissioning. The 20 mm rear screw adjustment lets technicians fine-tune the stop point without removing the cylinder or fabricating custom shims.
Small Part Ejectors
Use the adjustable stroke to set a precise push-off distance for ejecting parts from a conveyor or nest. The 402 N push force at 0.5 MPa handles light to medium ejection tasks reliably.
Wear Take-Up
Compensate for tooling or gripper pad wear over time. The screw adjustment lets operators restore the original stroke end position in seconds, extending the service life of the end-of-arm tooling.
Is the Airtac SCJ32 Standard Cylinder SCJ32X40-20 the Right Cylinder?
Choose the SCJ32X40-20 when you need to fine-tune the stroke end position within a 20 mm window without replacing the cylinder or adding external hard stops. If your application demands more force, step up to the 40 mm bore SCJ40 series, which provides 628 N push at 0.5 MPa. For applications where the stroke is fixed and never needs field adjustment, the standard SC32 fixed-stroke cylinder is a simpler, cost-effective alternative. This SCJ32X40-20 is a direct replacement for another AirTAC SCJ32 adjustable-stroke cylinder of the same 40 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting configuration.
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 SCJ32X40-20 FAQ
At 0.5 MPa the cylinder produces 402 N of push force and 345 N of pull force. The push force is higher because the single rod reduces the piston area on the pull side. At the maximum operating pressure of 0.9 MPa, push force reaches 724 N.
Yes, if you need the adjustable stroke feature. The SCJ32X40-20 has the same 32 mm bore, PT1/8 ports, and mounting footprint as the SC32 series, but the body is slightly longer to accommodate the rear adjusting screw. Ensure your machine has clearance for the extra length and that you need the 20 mm adjustment range.
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