This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X100S, with the same bore, stroke, output force, port and mounting, so it fits the same application. 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 100mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X100S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X100S
- 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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S
The AirTAC B04-SID50X100S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 825 N (@0.5 MPa). The B04- prefix marks this as a construction-machinery dedicated variant of the base SID50X100S, mechanically identical to it. This discontinued model drops in directly to the SAID50X100S: same G1/4 port, M16x1.5 thread, and 30 mm adjustable cushions. The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Because both faces use the rod-side area, force is equal both ways (825/1154/1484 N at 0.5/0.7/0.9 MPa). A second rod can carry a sensor cam or drive two tools simultaneously with anti-rotation stability. Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end. For held loads, use an external rod lock or the SAIL/BSAI lock variants.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X100S |
| Bore size | Ø50 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID50X100S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The B04-SAID50X100S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment where equal push and pull force is required for precise linkage positioning without rotational drift.
Synchronized Material Transfer
Uses both extending rods to push and pull parts simultaneously between construction-machinery assembly stations, doubling cycle efficiency.
Guided Press Fixture
Employs the double-rod architecture for high anti-rotation resistance when clamping heavy steel components in a fabrication jig.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S with the B04-SAID50X100S
To replace the discontinued B04-SID50X100S, use the SAID50X100S. It is a direct: same 50 mm bore, 100 mm stroke, G1/4 port, and ISO 15552 mounting interface (Basic, FA, LB, TC). Size both ways by checking equal force at neighbouring bores: the 40 mm yields 528 N and the 63 mm yields 1402 N (@0.5 MPa). A double rod is right when you need equal push/pull force, anti-rotation stability, or a back rod to carry a sensor cam. The -S suffix means a magnet is present for legacy CS1-B/DS1-B switches (the SAI uses current switches). For this 100 mm stroke, side-load is minimal, but for strokes >=300 mm ensure guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X100S
- ✓ 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-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X100S FAQ
Yes, the B04-SID50X100S is discontinued. The direct replacement is the SAID50X100S. The B04- prefix simply marks it as construction-machinery dedicated; mechanically it is identical to the base SID50X100S. The SAID replacement shares the same ISO 15552 mounting, 50 mm bore, 100 mm stroke, G1/4 port, and equal both ways force, but adds an upgraded piston seal.
Force is equal both ways because a rod exits both ends: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The air port is G1/4, the rod thread is M16x1.5, and it features 30 mm adjustable cushions at each end. It operates at 0.15-1.0 MPa with speeds of 30-800 mm/s.
Related AirTAC SAI Cylinders
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