This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD50X100 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD50X100 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-SUD50X100
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD50X100 is a double-acting profile-type standard cylinder with a Ø50mm bore and 100mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD50X100, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke100 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAUD50X100
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD50X100
The B04-SUD50X100 is an AirTAC construction-machinery dedicated double-acting profile cylinder; the B04- prefix marks it as a heavy-equipment variant mechanically identical to the standard SUD50X100. As a double-rod unit, a rod exits both ends on one piston, meaning push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same 50 mm bore. This SKU has no magnet and cannot take a sensor. It features a 1/4 inch port, M16x1.5 rod thread, and 21 mm adjustable cushions.
This SUD model is discontinued and the exact drop-in replacement is the SAUD50X100, retaining the same bore, stroke, equal-both-ways force, 1/4 port, and FA/LB mounting. The SAUD upgrades to current CMSG/DMSG/EMSG sensors (this legacy model used CS1-B/DS1-B) and offers an SAUF built-in-valve variant. For sizing, the computed safe working load is roughly 495 N (60% of the 825 N @0.5 figure), yielding a vertical lift capacity of about 42 kg with a 2:1 margin. Note that air cushions only decelerate near stroke end; an external rod lock is required for load holding.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD50X100 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD50X100 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD50X100 |
| Bore size | Ø50 mm |
| Stroke | 100 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| 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, 21 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The B04-SAUD50X100 carries the same 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-SAUD50X100 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-SUD50X100
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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-SUD50X100 Is Used
Excavator Linkage
Equal both ways force drives dual-tool linkage on heavy equipment without the push bias of a single rod.
Loader Gate Actuator
The compact profile barrel fits tight construction-machinery frames while providing anti-rotation stability.
Crusher Tooling
Drives two opposing tools simultaneously from one piston, ideal for heavy-duty material processing.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD50X100 with the B04-SAUD50X100
To replace the B04-SUD50X100, order the drop-in SAUD50X100, which matches the 50 mm bore, 100 mm stroke, 1/4 port, and FA/LB mounting. Because force is equal both ways, size both directions by checking neighbouring bores against the 825 N @0.5 MPa rating. A double rod is right when you need anti-rotation, a back rod to carry a sensor cam, or to drive two tools. Since this SKU lacks a magnet (-S), you cannot mount switches; the SAUD uses CMSG/DMSG/EMSG sensors. For strokes >=300 mm, verify side-load tolerance. A plain cylinder drifts on air loss, so add an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD50X100
- ✓ 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-SUD50X100 FAQ
Yes, it is discontinued. The exact drop-in replacement is the SAUD50X100. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SUD50X100, so all physical specs match. The SAUD keeps the same bore, stroke, 1/4 port, and FA/LB mounting.
Because it is a double-rod cylinder, force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The bore is 50 mm with a 1/4 inch port. The safe working load is roughly 495 N, allowing a vertical lift of about 42 kg with a 2:1 margin.
Related AirTAC SAU Cylinders
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