Airtac SCJ32 Standard Cylinder SCJ32X70-20S
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X70-20S 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, 70mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke70 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X70-20S
The SCJ32X70-20S is a compact double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. With a 32 mm bore and a 12 mm piston rod, it delivers 402 N of push force at 0.5 MPa, while the rear adjusting screw lets you shorten the effective stroke by up to 20 mm without dismounting the unit. This model includes a built-in magnet, allowing CMSG/DMSG/EMSG sensors to be clamped directly onto the tie-rod barrel for reliable, non-contact position sensing.
The adjustable range is ideal for commissioning trials, format changeovers, or taking up mechanical wear on small automation cells. Its 182 mm body length (A dimension) keeps the footprint tight, and the standard PT1/8 ports and M10x1.25 rod thread integrate easily into existing sub-assemblies. The 21 mm air cushion at each end ensures quiet, controlled deceleration within a speed range of 30-800 mm/s.
Airtac SCJ32 Standard Cylinder SCJ32X70-20S Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X70-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 70 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 SCJ32X70-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×70 | 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 SCJ32X70-20S Is Used
End-Stop Commissioning
Fine-tune the retract stroke end position during machine setup. The 20 mm screw adjustment allows operators to dial in the exact stopping point for pick-and-place heads without swapping cylinders.
Small-Part Diverter Gates
Adjust the gate opening stroke on a packaging line conveyor. The built-in magnet provides end-of-stroke confirmation via a DMSG sensor, ensuring the gate is fully open or closed after each format change.
Wear Compensation in Clamping
Use the adjustable stroke to compensate for jaw or pad wear in a repetitive clamping fixture. The 402 N push force at 0.5 MPa provides secure holding, while the screw takes up the slack over time.
Is the Airtac SCJ32 Standard Cylinder SCJ32X70-20S the Right Cylinder?
Step up to the 40 mm bore SCJ (628 N push at 0.5 MPa) if your application demands more force, or drop to a fixed-stroke SC32 if the stroke never needs field adjustment. The SCJ32X70-20S is a direct replacement for any AirTAC SCJ32 with a 70 mm nominal stroke, a 20 mm adjust range, PT ports, and a magnet, provided the mounting style matches. Since this is a basic mount model, it requires external brackets for installation; the FA front flange or LB foot mount are available as accessories. For strokes over 300 mm, evaluate side-loading on the 12 mm rod and consider adding an external guide rail.
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 SCJ32X70-20S FAQ
At the standard operating pressure of 0.5 MPa, this 32 mm bore cylinder generates 402 N of push force and 345 N of pull force. The maximum push force at 0.9 MPa is 724 N. Remember that as a single-rod cylinder, the push force is always greater than the pull force due to the area of the 12 mm rod.
Yes, if you need the ability to fine-tune the stroke end. The SCJ32X70-20S matches the mounting footprint of a standard SC32 but adds a rear adjusting screw that can shorten the stroke by up to 20 mm. Ensure the port size (PT1/8), magnet option (S), and mounting accessories are compatible with your existing setup.
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