This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X175-20, 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 SUJ40X175-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X175-20 is a double-acting profile-type standard cylinder with a Ø40mm bore and 175mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X175-20, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke175 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X175-20
- 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 SUJ40X175-20
The AirTAC SUJ40X175-20 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, yielding a usable 155-175 mm extension out of the 175 mm nominal maximum. The stop screw sets the end position but is not a load lock; holding a load requires an external rod lock or pilot-operated check valve.
The direct replacement is the SAUJ40X175-20, matching the 40 mm bore, force, and FA/LB mounting. Upgrading to the SAUJ allows use of current CMSG/DMSG/EMSG sensors, whereas this legacy model used CS1-B/DS1-B switches. Since this SKU lacks a magnet, it cannot take a magnetic switch.
Airtac SUJ Adjustable Cylinder SUJ40X175-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X175-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X175-20 |
| Bore size | Ø40 mm |
| Stroke | 175 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 SAUJ40X175-20 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 SAUJ40X175-20 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 SUJ40X175-20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 SUJ40X175-20 Is Used
Diverter Gate Positioning
Allows on-site tuning of the extend stroke by up to 20 mm to hit the exact angle needed on a diverter gate without machining hard stops.
Product Pusher Adjustment
Trimming the extend stroke lets operators change push distances on a conveyor line for varying package sizes directly at the fixture.
Sealing Head Timing
Provides a 155-175 mm usable extend window to dial in the exact contact point of a sealing head against variable product heights.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X175-20 with the SAUJ40X175-20
To replace this discontinued SUJ40X175-20, order the direct replacement SAUJ40X175-20, which preserves the 40 mm bore, 175 mm stroke, 20 mm adjust window, and 1/4" port. Choose the 20 mm adjust window when you need precise field tuning of the extend stroke; a fixed SAU cylinder plus external stop is bulkier. Mounting uses basic, FA, and LB brackets compatible with the SC series. Because this SKU has no magnet, it cannot support sensing; the SAUJ -S variant uses CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. For strokes of 300 mm or longer, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X175-20
- ✓ 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 SUJ40X175-20 FAQ
Yes, the AirTAC SUJ40X175-20 is discontinued. The direct replacement is the SAUJ40X175-20, which matches the 40 mm bore, 175 mm nominal stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The double-acting double-rod cylinder has a 20 mm adjust window, allowing the 175 mm extend stroke to be shortened to 155 mm on-site. The 1/4" port and 16 mm rod are fixed for the 40 mm bore. The stop screw sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X175-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X175-20 replacement — usually within 7-8 hours.