Airtac SCJ40 Standard Cylinder SCJ40X200-30
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X200-30 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, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke200 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X200-30
The SCJ40X200-30 is a 40 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 628 N push and 528 N pull, suiting it to medium-force positioning and clamping tasks where the exact stop point must be dialled in during commissioning or changeover.
With a 16 mm piston rod, PT1/4 ports and a 21 mm air cushion, this tie-rod cylinder handles speeds of 30-800 mm/s. The SCJ body length A is 185 mm, slightly longer than the fixed-stroke SC to house the adjusting mechanism. The 200 mm nominal stroke is well within the 1200 mm maximum standard stroke for bore 40.
Airtac SCJ40 Standard Cylinder SCJ40X200-30 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X200-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 200 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 SCJ40X200-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×200 | 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 SCJ40X200-30 Is Used
Commissioning & Setup
Dial in the exact stop position during machine build or trial runs. The 30 mm rear screw adjustment lets technicians fine-tune the stroke end without swapping cylinders or machining spacers.
Product Format Changeover
Quickly adapt a pusher or diverter stroke for different box or pallet sizes on a packaging line. Operators adjust the screw to match the new product width, minimising downtime between batches.
Wear Compensation
Take up mechanical play or seal compression over time in clamping fixtures. The adjustable stroke end can be advanced slightly to maintain consistent clamp force as tooling beds in.
Is the Airtac SCJ40 Standard Cylinder SCJ40X200-30 the Right Cylinder?
Choose the SCJ40X200-30 when you need to set the retract or extend end position precisely without adding external hard stops. If the 628 N push force is marginal, stepping up to a 50 mm bore (SCJ50) raises push to 982 N at the same 0.5 MPa. For applications that do not require stroke adjustment, the simpler fixed-stroke SC40 is a lighter, lower-cost alternative.
For direct replacement, match an AirTAC SCJ cylinder of identical 40 mm bore, 200 mm nominal stroke, 30 mm adjust range, PT port thread and basic mounting. If the rod sees lateral loads, especially at this 200 mm extension, add an external guide rail or consider a guided cylinder to prevent rod bending and premature seal wear.
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 SCJ40X200-30 FAQ
At 0.5 MPa the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 0.9 MPa, push reaches 1130 N. Because it is a single-rod cylinder, push force is always higher than pull force due to the rod area on the return side.
Yes, provided the slightly longer body length (A=185 mm) fits your mounting space and you need the adjustable stroke feature. The port size, rod diameter and mounting accessories are identical. If you do not need stroke adjustment, the fixed-stroke SC40 is a more compact, economical choice.
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