This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD50X155S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD50X155S 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 SUD Series Double Rod Cylinder SUD50X155S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X155S is a double-acting profile-type standard cylinder with a Ø50mm bore and 155mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD50X155S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke155 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X155S
About the Airtac SUD Series Double Rod Cylinder SUD50X155S
The AirTAC SUD50X155S is a double-acting, double-rod profile cylinder featuring a 50mm bore, 155mm stroke, and a 1/4 inch air port. Because a rod exits both ends on a single piston, both faces use the rod-side area, making push and pull force equal at 825N @0.5 MPa, 1154N @0.7 MPa, and 1484N @0.9 MPa. This SUD model is discontinued; the exact drop-in replacement is the SAUD50X155S, which matches the bore, stroke, force, and FA/LB mounting.
The dual-rod design prevents piston rotation and lets the back rod carry a sensor cam for legacy CS1-B/DS1-B switches (the SAUD replacement uses current CMSG/DMSG/EMSG sensors). Based on the 825N @0.5 MPa rating, the safe working load is about 495N, allowing a vertical lift of roughly 42kg with a 2:1 margin. Note that air cushions only decelerate the piston near stroke end; an external rod lock is required to hold loads without live air.
Airtac SUD Series Double Rod Cylinder SUD50X155S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X155S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X155S |
| Bore size | Ø50 mm |
| Stroke | 155 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 SAUD50X155S 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 SAUD50X155S 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 SUD Series Double Rod Cylinder SUD50X155S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×155 | 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 SUD Series Double Rod Cylinder SUD50X155S Is Used
Anti-Rotation Drive
The twin-rod geometry prevents piston rotation, providing stable guidance for precision machining or pick-and-place units without external linear bearings.
Dual Tool Actuation
Use the rod extending from the back end to drive a secondary mechanism or cam, synchronizing two conveyor belt processes from one compact profile body.
Equal-Force Transfer
Ideal for material transfer stations requiring identical push and pull forces in both directions to shuttle pallets without speed or torque variation.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X155S with the SAUD50X155S
To replace the discontinued SUD50X155S, specify the SAUD50X155S drop-in equivalent, which preserves the 50mm bore, 155mm stroke, 1/4 inch port, and equal-both-ways force. When sizing both ways, verify that 825N @0.5 MPa suits your load, or step to neighbouring bores (63mm yields 1402N @0.5 MPa) if more force is needed. Choose a double-rod cylinder when anti-rotation or driving two tools is required. Mounting is limited to Basic, FA, and LB (SC-series compatible only). Because this unit has the -S magnet, upgrade your legacy CS1-B/DS1-B switches to CMSG/DMSG/EMSG sensors. For this 155mm stroke, ensure the side-load moment stays within the bearing capacity.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X155S
- ✓ 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 SUD Series Double Rod Cylinder SUD50X155S FAQ
Yes, the SUD50X155S is discontinued. The exact drop-in replacement is the SAUD50X155S. It matches the 50mm bore, 155mm stroke, 1/4 inch port, and FA/LB mounting, but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The 1/4 inch ported, 50mm bore double-rod design provides equal force both ways: 825N @0.5 MPa, 1154N @0.7 MPa, and 1484N @0.9 MPa. This yields a safe working load of roughly 495N and a vertical lift capacity of about 42kg with a 2:1 margin.
Related AirTAC SAU Cylinders
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