Airtac SCJ40 Standard Cylinder SCJ40X500-30
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X500-30 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 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-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X500-30
The SCJ40X500-30 is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly on the machine. A rear-cap adjusting screw lets you dial the stroke end back by up to 30 mm without removing the cylinder or adding external hard stops, which is invaluable during commissioning, format changeovers, or when taking up wear in a tooling nest.
With a 40 mm bore and a 16 mm piston rod, this cylinder delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The PT1/4 port and M12x1.25 rod thread keep connections straightforward, while the 21 mm air cushion at each end protects the end caps during high-cycle operation. Its body length A(SCJ) is 185 mm, making it a compact choice for a 500 mm nominal stroke.
Airtac SCJ40 Standard Cylinder SCJ40X500-30 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X500-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 30 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 SCJ40X500-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ40X500-30 Is Used
Commissioning & Setup
Fine-tune the end-of-stroke position on a new assembly fixture by up to 30 mm without re-plumbing or swapping cylinders, cutting setup time significantly.
Product Changeover
Quickly adjust a pusher or diverter stroke when switching between product sizes on a packaging line, eliminating the need for mechanical stop blocks.
Wear Compensation
Take up mechanical play in a clamping or pressing station over time by advancing the stroke end screw, maintaining consistent clamp force without re-machining stops.
Is the Airtac SCJ40 Standard Cylinder SCJ40X500-30 the Right Cylinder?
Choose the SCJ40 when your application needs about 628 N of push force at standard plant air. If you need more force, stepping up to the 50 mm bore SCJ50 series provides 982 N of push at the same 0.5 MPa. If your stroke never needs field adjustment, the fixed-stroke SC40X500 is a simpler, cost-effective alternative. For a direct replacement, match the 40 mm bore, 500 mm nominal stroke, 30 mm adjust range, PT port thread, and basic mounting style.
At a 500 mm stroke, rod deflection under side load becomes a design consideration. If the load is not guided externally, adding an external guide rail or switching to a guided cylinder assembly will protect the rod bearing and seals from premature wear and ensure reliable positioning.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ40X500-30 FAQ
At 0.5 MPa, it generates 628 N of push force and 528 N of pull force. The push force is higher because the single piston rod reduces the effective piston area on the pull side. At the maximum operating pressure of 0.9 MPa, the push force reaches 1130 N.
Yes, if you need the 30 mm stroke adjustment feature. The SCJ40X500-30 matches the SC40's 40 mm bore, 500 mm nominal stroke, PT1/4 ports, and basic mounting footprint. Ensure your machine has clearance for the slightly longer rear adjusting screw assembly.
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