Airtac SAIJ40 Adjustable Cylinder SAIJ40X95-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X95-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 95mm 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
- Stroke95 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40X95-20S
The AirTAC SAIJ40X95-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 95 mm stroke that can be fine-tuned down by up to 20 mm, giving you a usable travel window of 75-95 mm. In the 40 mm bore class, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, operating efficiently between 30-800 mm/s.
This variant includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors, and features a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides. Unlike fixed-stroke SAI models, this rear screw stopper lets you dial in the exact end position during commissioning without adding external stops. Remember the adjuster is a travel stop, not a lock; it cannot hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X95-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X95-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 95 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 SAIJ40X95-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×95 | 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 SAIJ40X95-20S Is Used
Machine Changeover
Dial in the 75-95 mm travel window during product size changes to set new end positions without physically swapping the cylinder.
End-Stop Calibration
Fine-tune the retract position at commissioning using the rear stopper, avoiding the need to bolt on external mechanical stops.
Variable Positioning
Handle varying package sizes on a line by adjusting the stroke length on the fly to push or divert items accurately.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X95-20S the Right Cylinder?
Select this adjustable cylinder when your setup requires precise end-position tuning during machine commissioning or product changeovers. If your application needs less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa; stepping up to a 50 mm bore provides 982 N. Since the 95 mm stroke is under 300 mm, side-load stress is minimal, though the 16 mm rod and M12x1.25 thread still handle standard loads well.
To match this exact configuration for an ISO 15552 replacement, specify the 40 mm bore, 95 mm stroke, 20 mm adjustment range, PT port thread, and the -S magnet option. Mounting choices include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the rear adjuster and air cushions only decelerate the travel end, use a SAIL or BSAI cylinder if you need true load-holding without continuous air pressure.
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 SAIJ40X95-20S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke by up to 20 mm. This creates a usable travel window of 75-95 mm from the 95 mm nominal stroke, allowing precise end-position tuning without replacing the cylinder.
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