Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-30S
The AirTAC SAIJ125X1000-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window from 970 to 1000 mm. Built with a carbon steel piston rod and a PT tapered port, it delivers a robust 6136 N pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides, and the -S magnet option provides direct compatibility with AirTAC CMSE reed and DMSE solid-state sensors for precise end-position feedback.
Because the stroke extends to 1000 mm, the M27x2 rod thread and 32 mm rod diameter are designed to handle substantial loads, though an external guide is strongly recommended to prevent side-load damage on this long unsupported length. The rear adjuster acts purely as a mechanical stop for end-position tuning during commissioning; it is not a lock, so the cylinder cannot hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125 Adjustable Cylinder SAIJ125X1000-30S Is Used
Long-Stroke Machining Clamps
Dials in the exact 970-1000 mm clamping position on oversized machining centers, allowing rapid accommodation of different part lengths without retooling the fixture.
Large Product Diverters
Adjusts the retract position on wide conveyor lines to handle varying pallet or product sizes, using the 30 mm rear stopper to fine-tune the diverting endpoint during commissioning.
Automated Assembly Presses
Provides 6136 N of pull force at 0.5 MPa for assembly operations, letting operators tweak the press depth window precisely to accommodate slight variations in component heights.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-30S the Right Cylinder?
Choose this 125 mm bore adjustable-stroke cylinder when your application requires high force and variable end-stops without swapping out the entire barrel. If your changeover needs are less demanding, stepping down to a 100 mm bore reduces the 0.5 MPa pull force to 3681 N, which may be sufficient for lighter fixtures. The SAIJ series is selected over the fixed-stroke SAI specifically to dial in the exact 970-1000 mm travel at setup, avoiding the need to bolt on external physical stops.
When replacing an ISO 15552 cylinder, verify the 125 mm bore, 1000 mm stroke, 30 mm adjustment range, PT port thread, and the -S magnet requirement. The SAIJ utilizes a specific mounting subset including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles. Because the stroke is 1000 mm, always pair it with an external linear guide to manage side loads and prevent rod binding.
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 SAIJ125 Adjustable Cylinder SAIJ125X1000-30S FAQ
The rear adjuster screw allows you to shorten the nominal 1000 mm stroke by up to 30 mm, creating a usable travel window of 970 to 1000 mm. This mechanical stop fine-tunes the retract end-position at commissioning without requiring external stops or a cylinder swap.
At 0.5 MPa operating pressure, it generates 6136 N of pull force and 8590 N of push force. The maximum operating speed for this 125 mm bore size is 30-500 mm/s.
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