Airtac SCJ40 Standard Cylinder SCJ40X75-30
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X75-30 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, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke75 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X75-30
The SCJ40X75-30 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that lets you field-tune the stroke end within a 30 mm range without removing the cylinder. At 0.5 MPa, it delivers 628 N push and 528 N pull, using a 16 mm diameter piston rod and PT1/4 ports.
Its tie-rod construction and adjustable end cushion suit repetitive positioning tasks where the machine layout may shift slightly during commissioning or after tooling changes. The body length A(SCJ) is 185 mm, and the maximum standard stroke for this 40 mm bore is 1200 mm.
Airtac SCJ40 Standard Cylinder SCJ40X75-30 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X75-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 75 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 SCJ40X75-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 SCJ40X75-30 Is Used
Commissioning Fine-Tuning
Adjust the 30 mm screw to dial in the exact stop position during machine bring-up, eliminating the need to shim or re-drill mounting brackets.
Small-Part Transfer
Use the 75 mm nominal stroke with a shortened end to precisely place components onto a conveyor without overshoot, compensating for belt wear over time.
Clamping & Holding
Set the stroke end to apply consistent clamping pressure on varying part thicknesses in a woodworking or light assembly fixture, using the 528 N pull force.
Is the Airtac SCJ40 Standard Cylinder SCJ40X75-30 the Right Cylinder?
Step up to a 50 mm bore (982 N push at 0.5 MPa) if your load approaches this cylinder’s 628 N limit, or down to 32 mm (402 N) for lighter, faster moves. Choose a fixed-stroke SC when the stroke never changes; pick the SCJ when you need to dial in the end position during setup or format changeovers. For direct replacement, match bore (40 mm), nominal stroke (75 mm), adjust range (30 mm), PT1/4 ports, basic mounting, and magnet option (none here). At strokes of 300 mm or more, consider an external guide or guided cylinder to manage side loads and protect the rod bearing.
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 SCJ40X75-30 FAQ
A screw in the rear cap limits how far the piston can retract, shortening the stroke end by up to 30 mm from the 75 mm nominal maximum. It sets the mechanical stop position, not the force or speed.
Yes, if you need field-adjustability. The SCJ body is slightly longer to house the screw, but the mounting footprint, 40 mm bore, PT1/4 ports, and rod thread (M12x1.25) match the SC. Ensure the 30 mm adjustment range covers your stroke variation.
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 SCJ40X75-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.