Airtac SCJ40 Standard Cylinder SCJ40X275-30
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X275-30 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, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke275 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X275-30
The SCJ40X275-30 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. In this 40 mm bore class, the 16 mm diameter piston rod generates 628 N of push force and 528 N of pull force at 0.5 MPa, making it a capable mid-range actuator for tasks that need fine end-position tuning without swapping the cylinder.
Its tie-rod construction keeps the body length A(SCJ) at a compact 185 mm, and the integrated air cushion (21 mm length) decelerates the piston smoothly near stroke end. The PT1/4 port and M12x1.25 rod thread are standard, and the 275 mm nominal stroke is well within the 1200 mm maximum for this bore.
Airtac SCJ40 Standard Cylinder SCJ40X275-30 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X275-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 275 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 SCJ40X275-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×275 | 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 SCJ40X275-30 Is Used
Format Changeover Stops
On packaging machines, the 30 mm screw adjustment lets operators quickly dial in a new end position for different box or carton sizes without mechanical rework, reducing downtime between product runs.
Clamping with Depth Control
In a woodworking or light assembly jig, the adjustable stroke sets a precise clamp depth. The 628 N push force at 0.5 MPa is sufficient for holding workpieces securely without crushing delicate materials.
Wear Compensation in Actuation
For a conveyor diverter gate that gradually wears its stop pad, the rear screw can be adjusted outward by a few millimeters to restore the exact gate alignment, extending the service interval of the wear component.
Is the Airtac SCJ40 Standard Cylinder SCJ40X275-30 the Right Cylinder?
Choose the SCJ40X275-30 when your application benefits from a 30 mm stroke-end adjustment range—ideal for commissioning tweaks or accommodating part tolerance stack-up. If you need more force, the 50 mm bore SCJ50 series delivers 982 N push at 0.5 MPa; for a lighter, more compact solution, the 32 mm bore provides 402 N. If your stroke is fixed and never needs field adjustment, a standard SC40X275 fixed-stroke cylinder is a simpler, cost-effective alternative. For strokes of 275 mm, consider an external guide rail if the rod experiences significant side loading to prevent 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 SCJ40X275-30 FAQ
At the standard 0.5 MPa operating pressure, this 40 mm bore cylinder delivers 628 N of push force and 528 N of pull force. The push force is higher because the single rod reduces the piston area on the return side. The maximum push force at 0.9 MPa is 1130 N.
You can replace an AirTAC SC40 of the same nominal stroke with this SCJ40X275-30 if you need the 30 mm stroke-end adjustability. Ensure the port thread (PT1/4), mounting style, and magnet option match your existing setup. The SCJ body is slightly longer than the fixed-stroke SC to house the adjusting screw mechanism.
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 SCJ40 Standard Cylinder SCJ40X275-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.