Airtac SAIJ40 Adjustable Cylinder SAIJ40X800-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40X800-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 800mm 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
- Stroke800 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 SAIJ40X800-50
The AirTAC SAIJ40X800-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 800 mm stroke with a 50 mm adjustment range, yielding a usable travel window of 750-800 mm for precise end-position tuning. Delivering 628 N of push force at 0.5 MPa, it handles medium-duty positioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a 16 mm carbon steel rod with an M12x1.25 thread, paired with PT (tapered) G1/4 ports. Air cushions at both ends decelerate the piston, but the rear adjuster acts strictly as a travel stop, not a load-holding lock. It supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ40 Adjustable Cylinder SAIJ40X800-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40X800-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 800 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 SAIJ40X800-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×800 | 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 SAIJ40X800-50 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 750-800 mm window during machine setup to accommodate varying material lengths without changing hardware.
Product Changeover Systems
Quickly adjust the stroke end-stop on packaging or sorting lines when switching to a different product size, minimizing downtime.
Long-Stroke Positioning
Leverage the 800 mm travel for extended reach operations while retaining the ability to fine-tune the final end-position by up to 50 mm.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40X800-50 the Right Cylinder?
Choose this adjustable-stroke cylinder when you need to fine-tune the retract end position during machine commissioning or product changeovers without physically swapping the cylinder or adding external stopper blocks. If your application requires less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa; if you need more thrust, a 50 mm bore provides 982 N. Because the 800 mm stroke is long, an external guide rail is recommended to prevent excessive rod side-loading and premature seal wear.
For drop-in ISO 15552 interchangeability, match the 40 mm bore, 800 mm stroke, 50 mm adjustment, PT G1/4 port, and mounting interface. This SKU uses a standard carbon steel rod and lacks a magnet, so position sensing requires adding a separate external sensor or upgrading to an -S variant for internal CMSE or DMSE switches. Remember that a plain SAIJ does not hold position without live air; for load-holding without pressure, consider an AirTAC SAIL or BSAI series cylinder.
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 SAIJ40X800-50 FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm, providing a usable travel window of 750-800 mm. It acts as a mechanical stop to set the exact end position and does not lock the load without live air pressure.
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
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