This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAUD40X700S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAUD40X700S 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-SUD40X700S
The AirTAC Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700S is a double-acting profile-type standard cylinder with a Ø40mm bore and 700mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAUD40X700S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke700 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → B04-SAUD40X700S
About the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700S
The AirTAC B04-SUD40X700S is a double-acting, double-rod profile cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SUD40X700S, mechanically identical in every spec. Because a rod exits both ends on one piston, push and pull force are equal at 528N, 739N, and 950N at 0.5, 0.7, and 0.9 MPa. It features a 40mm bore, 1/4" port, M12x1.25 rod thread, and a 700mm stroke. This discontinued model is fully replaced by the SAUD40X700S.
The double-rod design prevents piston rotation and allows the back rod to drive a second tool or sensor cam. For buyers, the safe working load is roughly 317N (60% of the 528N @0.5 MPa figure), yielding a vertical lift capacity of about 27kg with a 2:1 margin. The SAUD upgrade retains the CS1-B/DS1-B sensor compatibility but shifts to current CMSG/DMSG/EMSG switches. Note that air cushions only decelerate; an external rod lock is required for load holding.
Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700S Technical Specifications
| Model | Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | B04-SAUD40X700S |
| Bore size | Ø40 mm |
| Stroke | 700 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-SAUD40X700S 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-SAUD40X700S 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-SUD40X700S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×700 | 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-SUD40X700S Is Used
Excavator Panel Pusher
Uses the equal both-ways force to extend and retract a positioning panel on heavy equipment without rotational drift.
Crane Slewing Stop
Employs the dual-rod anti-rotation feature to lock a slew mechanism reliably in construction machinery.
Loader Linkage Cam
Leverages the back rod to carry a sensor cam, confirming linkage position on a front-end loader.
Replacing the Airtac B04-SUD Construction Machinery Special Standard Cylinder B04-SUD40X700S with the B04-SAUD40X700S
To replace the B04-SUD40X700S, order the drop-in SAUD40X700S, which matches the 40mm bore, 700mm stroke, 1/4" port, and FA/LB mounting. When sizing both ways, verify the equal force (528N @0.5 MPa) meets your needs, or step to neighbouring bores. A double rod is right when you need anti-rotation or dual-end actuation. Because the stroke is 700mm, add external guides to prevent rod bending under side-load. The -S magnet means upgrading from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG sensors on the SAUD.
Replacement checklist
- ✓ Same bore / stroke → B04-SAUD40X700S
- ✓ 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-SUD40X700S FAQ
Yes, the B04-SUD40X700S is discontinued. The B04- prefix marks it as the construction-machinery dedicated variant of the SUD40X700S. The exact drop-in replacement is the SAUD40X700S, which matches the bore, stroke, force, and mounting.
The 40mm bore has a 1/4" port. Because it is a double-rod cylinder, force is equal both ways: 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa.
Related AirTAC SAU Cylinders
Request a Quote for the B04-SAUD40X700S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAUD40X700S replacement — usually within 7-8 hours.