Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20S 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
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20S
The AirTAC SAIJ40X95-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 75-95 mm, allowing you to dial back the 95 mm nominal stroke by up to 20 mm during commissioning. Delivering 628 N of push force at 0.5 MPa, it is tailored for precise end-position tuning without swapping out the physical cylinder.
This specific SKU upgrades the standard carbon steel piston rod to a SUS304 stainless steel rod (option B), offering superior corrosion resistance for harsher environments. It includes a magnetic piston (-S) for position feedback, compatible with AirTAC CMSE reed and DMSE electronic sensors via the dual-side sensor grooves on the extruded aluminum barrel. It uses a G1/4 port and omits the FB, CA, CB, and CR mounts, supporting only the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting interfaces.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20S |
|---|---|
| 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 SAIJ40BX95-20S
| 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 SAIJ40BX95-20S Is Used
Product Changeover
Quickly fine-tune the retract end-position by up to 20 mm during packaging line format changes, accommodating varying carton sizes without replacing hardware.
Sensor-Driven Setup
Leverage the integrated magnetic piston with DMSE electronic sensors to confirm the adjusted 75-95 mm travel window in automated assembly testing.
Corrosive Environments
Deploy the SUS304 stainless steel rod in food processing or light chemical automation tasks requiring precise end-stops and washdown resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX95-20S the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 628 N push force at 0.5 MPa (or 879 N at 0.7 MPa) and on-the-fly stroke trimming. If your process demands less force, stepping down to a 32 mm bore yields 402 N, whereas stepping up to a 50 mm bore provides 982 N. The adjustable rear stopper is ideal for machine setups requiring variable end stops or product-size changeovers, eliminating the need to bolt on external physical stops or buy a fixed-stroke SAI cylinder for every specific length.
Because the rear adjuster acts only as a travel stop and the air cushions manage deceleration, this cylinder cannot hold a load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series instead. When replacing an ISO 15552 cylinder, match the 40 mm bore, 95 mm stroke, 20 mm adjustment range, G1/4 PT port, and the -S magnet requirement. The SUS304 rod material handles minor side loads well, but long unsupported strokes still require an external guide.
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 SAIJ40BX95-20S FAQ
At 0.5 MPa, 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 operational speed range is 30-800 mm/s.
The rear external adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke from 95 mm down to as little as 75 mm. This creates a 75-95 mm adjustable travel window for fine-tuning end positions at commissioning, but it does not lock the load without live air pressure.
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