This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI100X250TC — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI100X250TC in place of this model. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI100X250TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAI100X250TC
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC
The B04-SI100X250TC is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions at both ends. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the SI100X250TC, mechanically identical to the base model. It delivers a thrust of 3927 N at 0.5 MPa, making it suited for heavy-equipment actuation. This SKU lacks a magnet and cannot accept a sensor.
AirTAC replaced the SI line with the SAI family. The SAI100X250TC is the exact drop-in replacement, retaining the same 100mm bore, 250mm stroke, G1/2 port, M20x1.5 rod thread and TC trunnion mount. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For your sizing, the safe working load is roughly 2356 N (60% of the 0.5MPa push force), yielding a vertical lift capacity of about 200kg with a 2:1 margin.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI100X250TC |
| Bore size | Ø100 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAI100X250TC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The B04-SAI100X250TC produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC Is Used
Excavator Arm Actuation
Drives secondary articulating arms or covers on heavy excavation equipment, utilizing the 3927 N push force to move robust steel components reliably.
Concrete Pump Gates
Actuates heavy discharge gates on construction concrete pumps, where the G1/2 port and 100mm bore provide the necessary volume and thrust for sticky material flow.
Heavy Equipment Lifting
Provides vertical lifting motion in specialized material handlers, safely managing loads up to 200 kg with a 2:1 safety margin at 0.5 MPa.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC with the B04-SAI100X250TC
To replace this discontinued cylinder, order the SAI100X250TC. It is dimensionally interchangeable per the ISO 15552 mounting interface, fitting the existing TC trunnion fixture without modifications. Confirm your port thread (PT, G or NPT) and note this non-magnet SKU cannot hold a CS1-B/DS1-B switch. If you need a larger or smaller bore, neighboring sizes are 80mm (2513N push at 0.5MPa) and 125mm (6136N push). A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants. For this 250mm stroke, ensure guide alignment to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI100X250TC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI100X250TC FAQ
Yes, the B04-SI100X250TC is discontinued. The exact drop-in replacement is the SAI100X250TC. It shares the identical ISO 15552 mounting interface, 100mm bore, 250mm stroke, G1/2 port and TC trunnion mount. The B04- prefix simply denoted the construction-machinery dedicated variant, and the SAI replacement matches all physical specs while adding an upgraded piston seal.
At 0.5 MPa it provides 3927 N push and 3681 N pull force. At 0.7 MPa push is 5497 N, and at 0.9 MPa it is 7068 N. The theoretical max force is 801 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, speed is 30-800 mm/s, and the G1/2 port and M20x1.5 rod thread are fixed by the 100mm bore.
Related AirTAC SAI Cylinders
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