This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD63X125, with the same bore, stroke, output force, port and mounting, so it fits the same application. 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 SUD63X125
The AirTAC Airtac SUD Series Double Rod Cylinder SUD63X125 is a double-acting profile-type standard cylinder with a Ø63mm bore and 125mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD63X125, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke125 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD63X125
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SUD Series Double Rod Cylinder SUD63X125
The AirTAC SUD63X125 is a discontinued double-acting double-rod profile cylinder. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal (1402 N at 0.5 MPa). The direct replacement is the SAUD63X125, matching the 63mm bore, 125mm stroke, 3/8 port and FA/LB mounting. The SAUD upgrade uses current CMSG/DMSG/EMSG sensors where this legacy model used CS1-B/DS1-B, and offers the SAUF built-in-valve variant the SU line lacked.
With a 20mm rod, M16x1.5 thread and 21mm adjustable air cushions, this extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same bore. Because the rear rod can carry a sensor cam or drive two tools simultaneously, it provides excellent anti-rotation stability. Note this non-magnetic SKU cannot take a switch, and the cushion only decelerates near stroke end—it is not a lock for held loads.
Airtac SUD Series Double Rod Cylinder SUD63X125 Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD63X125 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD63X125 |
| Bore size | Ø63 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| 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 1500 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUD63X125 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAUD63X125 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUD Series Double Rod Cylinder SUD63X125
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 63 | 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 SUD Series Double Rod Cylinder SUD63X125 Is Used
Dual-Tool Machining Station
Drives two opposing tools simultaneously from one piston, utilising the equal both-ways force to machine parts on both ends without stroke variance.
Anti-Rotation Transfer Gate
Uses the twin rods exiting both ends to prevent mechanical rotation during heavy part diversion on a 63mm bore packaging line.
Symmetric Push-Pull Sorter
Handles balanced push and pull operations where the 1402 N force at 0.5 MPa is identical in both directions for precise sorting.
Replacing the Airtac SUD Series Double Rod Cylinder SUD63X125 with the SAUD63X125
To replace the discontinued SUD63X125, order the SAUD63X125 direct (same 63mm bore, 125mm stroke, 3/8 port, and FA/LB mounting). Size both ways by checking neighbour bores while ensuring the equal-both-ways force meets your requirement. Choose a double rod when you need anti-rotation stability or must drive two tools from one piston. If upgrading sensing, note the SAUD uses CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. For stroke lengths over 300mm, verify the side-load limits to prevent guide wear. A plain cylinder does not hold loads on air loss; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUD63X125
- ✓ 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 SUD63X125 FAQ
Yes, the SUD63X125 is discontinued. The direct replacement is the SAUD63X125, which matches the 63mm bore, 125mm stroke, 3/8 port, and FA/LB mounting. The SAUD also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
Force is equal both ways (double-rod): 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and 2523 N at 0.9 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD63X125
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD63X125 replacement — usually within 7-8 hours.