Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 670mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ25 mm
- Stroke670 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU
Built on a riveted stainless round barrel with a hard-chrome plated rod, the MAC25X670SU is a double acting mini cylinder that carries a 25 mm bore over a 670 mm made-to-order stroke, pushing 245 N at 0.5 MPa (343 N at 0.7 MPa) while air returns the rod at 206 N. The variable air cushion at both ends is dialled in with the needle screws, so a fast 670 mm traverse does not hammer the aluminium covers.
Running the numbers: keep real work near 147 N at 0.5 MPa and the cylinder stays in a relaxed band; on a straight vertical lift that is about 25 kg theoretical, or 12 kg with a 2:1 margin. The stainless tube shrugs off the condensation and washdown spray that pit painted minis, and the piston magnet ships fitted as standard, ready for CMSG, DMSG or EMSG switches.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 670 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×670 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU Is Used
Shrink-wrap carton pusher
A full 670 mm sweep clears one complete row of cartons per cycle; the usable 147 N push at 0.5 MPa slides loaded stacks without denting the board.
Bottling line rinser diverter
The stainless barrel and chrome rod stand up to the wet splash zone around a bottle rinser, while the built-in magnet feeds a DMSG switch to confirm the gate is fully open.
Feeder gate on a block press
Opens and closes a wide sand or aggregate gate anywhere in the 30-800 mm/s band; the variable cushion at both ends stops the heavy flap slamming its frame.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU the Right Cylinder?
A 20 mm bore gives 157 N push at 0.5 MPa if the load is light, while a 32 mm bore reaches 402 N push at 0.5 MPa when friction along the long axis climbs; 25 mm at 245 N covers the middle. Since 670 mm is well past the 500 mm standard cap, order it as a non-standard stroke and guide the rod with a linear slide, because unsupported long strokes bend rods under side load. This SU version has a U flat-end back cover that bolts flush to a fixed plate. Note the plain MAC will not hold position if air is lost - fit a rod lock or pilot check valve where a parked rod matters.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X670SU FAQ
At 0.5 MPa the 25 mm bore pushes 245 N and pulls 206 N; at 0.7 MPa it reaches 343 N push and 289 N pull, with a theoretical maximum of 50 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi) and proof pressure 1.5 MPa (215 psi). Speed range is 30-800 mm/s, fluid is air filtered to 40 um, and the 670 mm stroke is made to order above the 500 mm standard limit.
No. The magnet is built into the piston as standard, so CMSG, DMSG or EMSG reed switches clip straight onto the stainless barrel for end-of-stroke signals. On first run, back the cushion needle screws fully open, then close them gradually to tune the deceleration at both ends of the 670 mm travel.
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