Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 950mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke950 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75
The AirTAC SAIJ40X950-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel within an 875 to 950 mm window. It delivers 879 N of push force at 0.7 MPa, making it well-suited for moderate-load positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This specific SKU uses a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It features a PT tapered port thread and operates at speeds between 30 and 800 mm/s. The rear adjustment mechanism functions strictly as a travel stop to set the end position, meaning it will not hold the load statically without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 950 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×950 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75 Is Used
Product Changeover Tuning
Dial in the exact 875 to 950 mm end-stop on the fly when switching between product sizes on a packaging line, avoiding mechanical cylinder swaps.
Extended Travel Sorting
Drives long-travel diverters or pushers on material handling conveyors where the final resting position needs occasional rear adjustment.
Machine Setup Calibration
Provides a 75 mm setup window for commissioning automated assembly stations, allowing technicians to trim the stroke precisely to the fixture.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75 the Right Cylinder?
Choose this 40 mm bore when a 32 mm bore (providing 563 N push at 0.5 MPa) is insufficient for your load, but a 50 mm bore (982 N at 0.5 MPa) would be excessive. The 75 mm adjustment range is ideal for machinery requiring variable end-stops during product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder or bolt on external physical stops. For any load-holding requirements without continuous air pressure, you must integrate an external rod lock or pilot-operated check valve, or select a SAIL or BSAI series cylinder.
When replacing an existing ISO 15552 cylinder, verify the 40 mm bore, 950 mm stroke, 75 mm adjustment range, PT port thread, and standard mounting interface. Available mounting accessories include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because this unit has a 950 mm stroke, the 16 mm diameter rod will experience leverage forces over that distance; an external guide rail is strongly recommended to prevent rod side-loading and premature seal wear.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ40 Adjustable Cylinder SAIJ40AX950-75 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 740 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the nominal 950 mm stroke by up to 75 mm, creating an effective usable travel window of 875 to 950 mm. It only sets the end position and does not lock the load without live air pressure.
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