Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100S
The AirTAC SAIJ40X500-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628 Newtons of push force at 0.5 MPa and features a 500 mm nominal stroke that can be fine-tuned down by up to 100 mm, yielding a precise 400-500 mm usable travel window. This on-machine adjustability allows operators to dial in end positions during commissioning without swapping out the entire unit.
Built with a SUS304 stainless steel rod (option B) and PT tapered ports, this model includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded barrel grooves. It supports the standard SAIJ mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 500 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 SAIJ40BX500-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 SAIJ40BX500-100S Is Used
Product Changeovers
Dial in the 400-500 mm travel window during product size transitions without physically replacing the cylinder or adding external stopper blocks.
Machine Setup
Fine-tune the retract end-position at commissioning to perfectly seat parts, utilizing the 100 mm adjustment range for exact mechanical alignment.
Variable End Stops
Accommodate varying package lengths on a packaging line by adjusting the stroke rearward as needed via the built-in stopper screw.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100S the Right Cylinder?
Select this 40 mm bore when an application requires 628 N push or 528 N pull force at 0.5 MPa alongside variable end-stop positioning. If your setup needs less force, stepping down to a 32 mm bore yields 402 N; if higher thrust is required, a 50 mm bore provides 982 N. The adjustable stroke is chosen over a fixed SAI cylinder when product sizes change on a line, letting you trim the retract position by up to 100 mm on the fly. Remember that the rear adjuster acts strictly as a travel stop, not a lock; the cylinder cannot hold a load without live air, so consider a SAIL or BSAI cylinder if true load-holding is required.
Because this unit features a 500 mm stroke, the 16 mm rod and M12x1.25 rod thread need external guiding to prevent excessive side-loading on the piston. For a direct ISO 15552 replacement match, verify the 40 mm bore, 500 mm stroke, 100 mm adjustment range, PT port thread, desired mounting bracket, and the -S magnet option.
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 SAIJ40BX500-100S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 Newtons of push force and 528 Newtons of pull force. At 0.7 MPa, the push force increases to 879 Newtons.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 100 mm. This creates a 400-500 mm usable travel window, allowing you to fine-tune the end position without changing the cylinder, though it does not lock the load without live air pressure.
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