This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X80-20, 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 SUJ40X80-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X80-20 is a double-acting profile-type standard cylinder with a Ø40mm bore and 80mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X80-20, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X80-20
- 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 SUJ40X80-20
The AirTAC SUJ40X80-20 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, giving a usable 60-80 mm stroke out of the 80 mm nominal maximum. Built on a compact extruded aluminum profile barrel, it operates at 30-800 mm/s with a 1/4" port and M12x1.25 rod thread. This SUJ model is discontinued; the direct replacement is the SAUJ40X80-20, matching the 40 mm bore, 80 mm stroke, force, and FA/LB mounting.
Because this specific SKU lacks a magnet (-S), it cannot accept magnetic switches. Note that the stop screw sets the end position but is not a load lock; use an external rod lock for held loads. The SAUJ upgrade switches to current CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B.
Airtac SUJ Adjustable Cylinder SUJ40X80-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X80-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X80-20 |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAUJ40X80-20 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 SAUJ40X80-20 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 SUJ40X80-20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SUJ40X80-20 Is Used
Variable Stroke Clamping
Ideal for clamping stations where material thickness varies, using the 20 mm on-site stroke trim to adjust the extend position without swapping cylinders.
Adjustable Transfer Stops
Deployed as a transfer gate stop on conveyor lines, allowing operators to fine-tune the 60-80 mm extend length on the fly to accommodate different package sizes.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X80-20 with the SAUJ40X80-20
To replace the discontinued SUJ40X80-20, order the SAUJ40X80-20 direct, which preserves the 40 mm bore, 1/4" port, 80 mm nominal stroke, and 20 mm adjust window. Choose the 20 mm adjust window if you need field tuning between 60 and 80 mm; for fixed 80 mm strokes, a standard SAU avoids the stop screw. Mounting uses FA or LB brackets (SC-series compatible). Since this SKU has no magnet, you cannot fit sensors; the SAUJ supports CMSG/DMSG/EMSG switches. For strokes of 300 mm or longer, verify side-load limits to prevent rod binding. Remember, the stop screw sets end position and does not hold loads on air loss.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X80-20
- ✓ 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 SUJ40X80-20 FAQ
Yes, the AirTAC SUJ40X80-20 is discontinued. The direct replacement is the SAUJ40X80-20. It matches the 40 mm bore, 80 mm nominal stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The nominal 80 mm extend stroke can be shortened by up to 20 mm on-site, yielding a 60-80 mm usable stroke. It operates at 30-800 mm/s, uses a 1/4" port, and the stop screw sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X80-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X80-20 replacement — usually within 7-8 hours.