Airtac SCJ32 Standard Cylinder SCJ32X45-20
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X45-20 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, 45mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke45 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X45-20
The SCJ32X45-20 is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides up to 20 mm of field-adjustable stroke-end control. With a 32 mm bore and a 12 mm diameter piston rod, it delivers 402 N of push force at 0.5 MPa, making it a compact solution for light-duty positioning tasks where the final stop point must be fine-tuned during commissioning.
This adjustable-stroke design allows machine builders to shorten the nominal 45 mm stroke without swapping the cylinder or adding external hard stops. The tie-rod construction uses PT1/8 ports and an M10x1.25 rod thread, with a 21 mm air cushion at each end to decelerate the piston smoothly. The body length A(SCJ) is 182 mm, slightly longer than a fixed-stroke SC of the same bore.
Airtac SCJ32 Standard Cylinder SCJ32X45-20 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X45-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 45 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 SCJ32X45-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×45 | 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 SCJ32X45-20 Is Used
End-Stop Commissioning
Fine-tune the retract stroke end on a pick-and-place gripper during setup, eliminating the need to shim or reposition the entire cylinder assembly.
Wear Take-Up in Clamping
Compensate for jaw or pad wear in a light-duty clamping station by adjusting the stroke end screw to maintain consistent clamping force over time.
Small Part Ejector Adjustment
Set the exact push distance for ejecting small plastic parts from a conveyor, allowing quick changes when switching between product heights.
Is the Airtac SCJ32 Standard Cylinder SCJ32X45-20 the Right Cylinder?
Choose the SCJ32X45-20 when you need to dial in a precise stroke end on a compact fixture. If 402 N push is marginal, stepping up to a 40 mm bore (628 N push at 0.5 MPa) gives a 56 % force increase. For applications where the stroke setting never changes after initial setup, the fixed-stroke SC series offers a simpler, lower-cost alternative. The adjustable screw sets only the stroke end position; it does not alter the cylinder's force output or speed.
A direct replacement must match the 32 mm bore, 45 mm nominal stroke, 20 mm adjust range, PT ports, and basic mounting. If side loads are present, use an external guide rod or switch to a guided cylinder, as the SCJ's plain bearing is not designed to absorb lateral forces.
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 SCJ32X45-20 FAQ
At 0.5 MPa, the push force is 402 N and the pull force is 345 N. Because this is a single-rod cylinder, push force is greater than pull force. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 804 N.
A rear-cap screw lets you shorten the stroke end by up to 20 mm from the nominal 45 mm. It is a direct upgrade for an SC32X45 when you need field adjustability, provided the port thread (PT), mounting, and magnet options match. The screw sets the mechanical stop position, not the air pressure or speed.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ32 Standard Cylinder SCJ32X45-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.