Airtac SCJ32 Standard Cylinder SCJ32X40-20S
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X40-20S 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, 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 SCJ32X40-20S
The SCJ32X40-20S brings field-adjustable stroke control to compact 32 mm bore applications, delivering 402 N of push force at 0.5 MPa. A rear-cap adjusting screw lets you fine-tune the stroke end by up to 20 mm without swapping the cylinder, making it ideal for commissioning trials or format changeovers on small assembly fixtures.
This model includes a built-in magnet, so CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing. The 12 mm rod, PT1/8 ports, and 21 mm air cushion keep the unit compact while still providing smooth deceleration.
Airtac SCJ32 Standard Cylinder SCJ32X40-20S Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X40-20S |
|---|---|
| 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 SCJ32X40-20S
| 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 SCJ32X40-20S Is Used
Commissioning & Setup
Fine-tune the stroke end by up to 20 mm during machine bring-up, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error positioning.
Small-Part Clamping
Adjust the retract or extend stop to accommodate slight variations in workpiece thickness on a pick-and-place or clamping station, ensuring consistent contact force.
Wear Take-Up
Compensate for seal or gripper wear over time by advancing the stroke end slightly, maintaining cycle precision without immediate cylinder replacement.
Is the Airtac SCJ32 Standard Cylinder SCJ32X40-20S the Right Cylinder?
Choose the SCJ32X40-20S when you need to dial in a precise stroke end on a 32 mm bore platform. If 402 N of push force is marginal, stepping up to the SCJ40 series provides 628 N at the same pressure. For applications that don't require stroke adjustability, the fixed-stroke SC32 series is a simpler, cost-effective alternative. This adjustable-stroke cylinder replaces any AirTAC SCJ32 with a 40 mm nominal stroke and 20 mm adjustment range, matching PT ports and the S magnet option.
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 SCJ32X40-20S FAQ
At 0.5 MPa, it produces 402 N pushing and 345 N pulling (the difference is due to the single 12 mm rod). At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 804 N.
A standard SC32 fixed-stroke cylinder will fit the same mounting, but you lose the 20 mm field-adjustment feature. For a direct replacement with the same adjustability and built-in magnet, you must use another SCJ32X40-20S.
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