This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD100X125 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD100X125 in place of this model. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125 is a double-acting profile-type standard cylinder with a Ø100mm bore and 125mm stroke, 1/2" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD100X125, which matches its bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke125 mm
- Port size1/2"
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAUD100X125
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125
The B04-SUD100X125 is an AirTAC double-acting, double-rod profile cylinder where a rod exits both ends, yielding equal push and pull force of 3681 N at 0.5 MPa, 5153 N at 0.7 MPa, and 6626 N at 0.9 MPa. The B04- prefix marks this as a construction-machinery dedicated variant, mechanically identical to the base SUD100X125 with a 100mm bore, 125mm stroke, 1/2" port, and M20x1.5 rod thread. This discontinued model is fully replaced by the SAUD100X125.
Because both faces use the rod-side area, force is equal both ways, enabling anti-rotation and the driving of two tools simultaneously. The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore. For sizing, the safe working load is about 2209 N (60% of the 0.5 MPa force), allowing a vertical lift of roughly 188 kg with a 2:1 margin. Note this SKU lacks a magnet and cannot take a sensor.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD100X125 |
| Bore size | Ø100 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | 1/2" |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD100X125 carries the same 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-SAUD100X125 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-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125 Is Used
Excavator Linkage
Drives dual opposing tools on heavy equipment with equal push and pull force, leveraging the 100mm bore for high-impact actuation.
Crusher Gate Control
Operates a synchronized gating mechanism on construction debris crushers, using the double-rod design to prevent rotation under heavy side loads.
Loader Attachment Shift
Shifts auxiliary attachments on construction loaders, utilizing the compact profile barrel to fit within tight machinery frames while delivering 3681 N at 0.5 MPa.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125 with the B04-SAUD100X125
To replace the discontinued B04-SUD100X125, use the drop-in SAUD100X125, which matches the 100mm bore, 125mm stroke, 1/2" port, and FA/LB mounting. When sizing both ways, verify your force needs against neighboring bores (80mm or 100mm) using the equal-both-ways force values. Choose a double-rod cylinder when you need anti-rotation, to drive two tools, or to mount a sensor cam on the back rod. If upgrading to SAUD, note the sensor change from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors. For strokes >=300mm, account for side-load line deflection. This non-magnetic SKU cannot hold a load without live air; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD100X125
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD100X125 FAQ
Yes, the B04-SUD100X125 is discontinued. The exact drop-in replacement is the SAUD100X125, offering the same 100mm bore, 125mm stroke, 1/2" port, and equal force. The B04- prefix simply marks it as construction-machinery dedicated; mechanically it is identical to the SUD100X125.
Force is equal both ways: 3681 N at 0.5 MPa, 5153 N at 0.7 MPa, and 6626 N at 0.9 MPa. The air port is 1/2". The safe working load is about 2209 N, allowing a vertical lift of roughly 188 kg with a 2:1 margin. It uses a 25mm rod and M20x1.5 thread.
Related AirTAC SAU Cylinders
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