Airtac SCJ40 Standard Cylinder SCJ40X500-50S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X500-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke500 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X500-50S
The SCJ40X500-50S is a double-acting, single-rod pneumatic cylinder that lets you fine-tune the stroke end position by up to 50 mm using the rear adjusting screw. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it a capable mid-range actuator for commissioning and format-change tasks.
This model includes a built-in magnet (-S suffix), so standard CMSG/DMSG/EMSG reed and solid-state sensors clip directly onto the tie-rod barrel for reliable end-of-stroke detection. The body length A dimension is 185 mm, and the PT1/4 port supplies filtered air for a speed range of 30-800 mm/s with adjustable pneumatic cushioning at both ends.
Airtac SCJ40 Standard Cylinder SCJ40X500-50S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X500-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCJ40 Standard Cylinder SCJ40X500-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -50 | 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 SCJ40 Standard Cylinder SCJ40X500-50S Is Used
Commissioning & Setup
Dial in the exact stroke end during machine commissioning without cutting rods or adding external hard stops. The 50 mm adjustment range gives technicians plenty of room to find the sweet spot.
Format Changeovers
Quickly adapt a packaging or assembly station to a new product size. The rear screw lets an operator shift the stroke end in seconds, minimizing downtime between batches.
Wear Compensation
Take up mechanical play or tooling wear over time by advancing the stroke end. This keeps a press or clamping fixture operating at the correct depth without replacing the actuator.
Is the Airtac SCJ40 Standard Cylinder SCJ40X500-50S the Right Cylinder?
Choose this 40 mm bore when you need more force than the 32 mm SCJ (402 N push at 0.5 MPa) but a more compact body than the 50 mm SCJ (982 N push). The 50 mm adjustable stroke range is ideal for applications that require regular end-stop tweaking without swapping the cylinder. If your stroke is fixed and you never need to adjust it, the standard SC series offers the same force in a slightly shorter body.
For a direct replacement, match an AirTAC SCJ40X500-50S with a magnet, PT1/4 port, and basic mounting. At a 500 mm stroke, watch for side loads on the 16 mm rod; use an external linear guide or switch to a guided cylinder if the load is not perfectly aligned.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ40 Standard Cylinder SCJ40X500-50S FAQ
At 0.5 MPa, it generates 628 N pushing and 528 N pulling. The maximum push force at the 0.9 MPa operating limit is 1130 N. Because it is a single-rod cylinder, the push force is always higher than the pull force due to the rod area.
A screw in the rear cap sets the stroke end position within a 50 mm range, shortening the nominal 500 mm stroke. It does not control speed or force. For speed adjustment, use external flow controls; for force, regulate the supply pressure.
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