This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD40X450 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD40X450 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-SUD40X450
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X450 is a double-acting profile-type standard cylinder with a Ø40mm bore and 450mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD40X450, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke450 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAUD40X450
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X450
The AirTAC B04-SUD40X450 is a double-acting, double-rod profile cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the SUD40X450, mechanically identical to the base model. Featuring a rod exiting both ends on a single piston, it delivers equal force both ways (528 N at 0.5 MPa, 739 N at 0.7 MPa, 950 N at 0.9 MPa). The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore. This discontinued model is replaced by the drop-in SAUD40X450, which retains the 1/4" port, M12x1.25 rod thread, and FA/LB mounting.
Because both faces use the rod-side area, the double-rod design provides anti-rotation stability and can drive two tools simultaneously. This SKU lacks a magnet (-S) and cannot take a magnetic switch; the modern SAUD uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. Based on the 528 N force at 0.5 MPa, the safe working load is approximately 317 N (60%), translating to a vertical lift capacity of about 27 kg with a 2:1 margin. Note that a plain cylinder does not hold loads on air loss; the 21 mm adjustable air cushions only decelerate near stroke end, so an external rod lock is required for held loads.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X450 Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X450 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD40X450 |
| Bore size | Ø40 mm |
| Stroke | 450 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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-SAUD40X450 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The B04-SAUD40X450 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-SUD40X450
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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-SUD40X450 Is Used
Excavator Panel Pusher
Equal both-ways force drives and retracts a heavy cabin panel alignment mechanism on construction machinery without stroke drift.
Loader Transfer Gate
The dual rods actuate a dual-sided material flow gate simultaneously, ensuring balanced sorting of aggregate on heavy equipment.
Crusher Tooling Actuator
Anti-rotation stability from the double-rod design keeps a rock-crushing jaw aligned during harsh, high-vibration construction operations.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X450 with the B04-SAUD40X450
To replace the B04-SUD40X450, use the exact drop-in SAUD40X450, which matches the 40mm bore, 450mm stroke, 1/4" port, and FA/LB mounting. When sizing both ways, verify the equal push/pull force of 528 N at 0.5 MPa fits your load, or step to neighboring bores (32mm or 50mm) if a different force is needed. A double rod is the right choice when you need anti-rotation resistance or must drive two mechanisms from one cylinder. Because this SKU has no magnet, it cannot use switches; upgrading to the SAUD allows modern CMSG/DMSG/EMSG sensors. For the 450mm stroke, external guides are recommended to prevent rod bending and manage side loads. Mounting compatibility is with the AirTAC SC series only.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD40X450
- ✓ 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-SUD40X450 FAQ
Yes, the B04-SUD40X450 is discontinued. The exact drop-in replacement is the SAUD40X450. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SUD40X450, and the SAUD matches its bore, stroke, 1/4" port, and FA/LB mounting exactly.
It features a 1/4" port and delivers equal force both ways: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The safe working load is approximately 317 N, allowing a vertical lift of about 27 kg with a 2:1 margin.
Related AirTAC SAU Cylinders
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