Airtac MAC Stainless Steel Mini Air Cylinder MAC25X155SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X155SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 155mm 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
- Stroke155 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 MAC25X155SU
Fixed-base machines that need reach rather than force get 155 mm of travel from this 25 mm MAC in a riveted stainless round barrel, with a hard-chrome plated 10 mm rod that takes coolant splash and outdoor humidity in stride. Push at 0.5 MPa is 245.3 N against 206.1 N on the return; budget roughly 147 N for the actual work and the cylinder stays well inside its comfort zone.
The U flat-end back cover bolts square to a machine face, so straight push-pull duty needs no pivot hardware. Double-acting air plus a variable cushion at both ends lets you run 30-800 mm/s without a metallic bang at either stop, and the piston magnet fitted as standard triggers CMSG, DMSG or EMSG switches for position feedback. Supply window: 0.15-1.0 MPa (22-145 psi).
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X155SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X155SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 155 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 MAC25X155SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×155 | 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 MAC25X155SU Is Used
Second-op lathe ejector
Pushes finished stubs 155 mm clear of the chucking station; 245.3 N at 0.5 MPa handles steel parts that a plastic-bodied mini cannot.
Light crimp press
Presses terminals and small inserts in an assembly cell, with the variable cushion easing the die onto the work instead of crashing it.
Case-erector flap tuck
Tucks bottom flaps through a 155 mm sweep on a carton erector, while DMSG switches confirm extended and retracted after every cycle.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X155SU the Right Cylinder?
If the load is light, a 16 mm bore at 100.5 N push may do; when dies or slides get heavier, the 32 mm bore raises push to 402.2 N at 0.5 MPa. Ports on this bore are 1/8" and the rod thread is M10x1.25. Note the rod moves freely when supply pressure drops - this cylinder parks nothing on its own - so add a pilot check valve or rod lock where a slide must hold. For a 155 mm stroke, guide any off-axis load externally and consider LB foot or FA flange brackets to stiffen the flat-end mount.
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 MAC25X155SU FAQ
At 0.5 MPa it delivers 245.3 N push and 206.1 N pull; at 0.7 MPa those climb to 343.4 N push and 288.5 N pull, with a theoretical maximum near 50 kgf at 1.0 MPa. It is double acting - air extends and retracts the rod - and both ends carry a variable air cushion.
Back both cushion needle screws nearly open on first run, then close them gradually until the stop becomes smooth; over-tightening slows the stroke. Keep speed inside 30-800 mm/s and the 155 mm rod will not hammer the aluminium covers.
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1-Year Warranty
Covers non-human-caused product damage.
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