This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ63X40-20S, 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 SUJ Adjustable Cylinder SUJ63X40-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ63X40-20S is a double-acting profile-type standard cylinder with a Ø63mm bore and 40mm stroke, 3/8" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ63X40-20S, which matches its bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke40 mm
- Port size3/8"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ63X40-20S
- 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 SUJ Adjustable Cylinder SUJ63X40-20S
The AirTAC SUJ63X40-20S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 20-40 mm extend window from the 40 mm nominal maximum. This discontinued unit is replaced direct by the SAUJ63X40-20S, retaining the exact bore, force, port, and FA/LB mounting.
The stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock for held loads. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B sensors, which must be upgraded to current CMSG/DMSG/EMSG switches on the SAUJ replacement.
Airtac SUJ Adjustable Cylinder SUJ63X40-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ63X40-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ63X40-20S |
| Bore size | Ø63 mm |
| Stroke | 40 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 SAUJ63X40-20S 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 SAUJ63X40-20S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUJ Adjustable Cylinder SUJ63X40-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×40 | 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 SUJ Adjustable Cylinder SUJ63X40-20S Is Used
Variable Pitch Pushing
Trimming the extend stroke on-site by up to 20 mm allows a single 63 mm bore cylinder to push parts of varying widths without machining custom spacers.
Adjustable Diverter Gate
Field-tuning the extend end position lets operators reposition a sorting gate precisely along the belt line to handle changing package sizes.
Light Press Registration
Dialing in the 20 mm stop screw provides exact bottoming height for pressing bearings, accommodating different material stack thicknesses on the fly.
Replacing the Airtac SUJ Adjustable Cylinder SUJ63X40-20S with the SAUJ63X40-20S
To replace the discontinued SUJ63X40-20S, order the direct replacement SAUJ63X40-20S, which preserves the 63 mm bore, 40 mm nominal stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. Choose the 20 mm adjust window if your fixture needs field tuning of the extend stroke; the external stop sets end position but is not a lock. Because this unit has the -S magnet, you must migrate from legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors. Since the 40 mm stroke is under 300 mm, side-load concerns are minimal, but always guide the rod to prevent binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ63X40-20S
- ✓ 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 SUJ Adjustable Cylinder SUJ63X40-20S FAQ
Yes, the SUJ63X40-20S is discontinued. The direct replacement is the SAUJ63X40-20S, which matches the 63 mm bore, 40 mm stroke, 20 mm adjust window, 3/8" port, and FA/LB mounting. You must upgrade the -S magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw allows you to trim the extend stroke by up to 20 mm on-site, creating a usable 20-40 mm extend window. The stop sets end position only and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ63X40-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ63X40-20S replacement — usually within 7-8 hours.