Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 20mm 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.
- BoreØ40 mm
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCM
A 40 mm bore MAC with a 20 mm stroke, this round-body mini cylinder is double acting - air drives the rod out and back - and a variable air cushion at each end soaks up stop shock. Running on 0.15-1.0 MPa (22-145 psi) it pushes 628.3 N at 0.5 MPa, enough for short ejection and clamp jobs; keep real working effort near 377 N so the cylinder holds a comfortable margin. Air enters through 1/8" ports.
The CM round-end back cover takes a pivot pin without adapters, while the stainless barrel and hard-chrome plated rod handle damp or lightly washed-down locations. A magnet ships built in, so CMSG, DMSG or EMSG switches bolt straight on for end-of-stroke signalling.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| 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 | 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MAC40X20SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MAC40X20SCM Is Used
Moulded part kick-off
Taps finished bushings off a mould core on a small injection press, where 628 N at 0.5 MPa over 20 mm is enough and the cushion stops the ejector slamming.
Snack pouch diverter
Swings a pusher across a conveyor to divert pouches at speed; the double-acting design retracts under air, not a spring, so cycle timing stays tight.
Position-sensed gate
Acts as a reject gate on a bottling line with a CMSG switch confirming each 20 mm stroke; no special-order piston needed since the magnet is standard.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCM the Right Cylinder?
Compare bores at 0.5 MPa push: 32 mm gives 402.2 N, this 40 mm gives 628.3 N, and 50 mm reaches 981.3 N - step down or up by load, not by guesswork. If the job is 20 mm of squeeze, a shorter-stroke bore 25 (245.3 N) may be plenty, but keep this bore when stiffness matters.
Like every double-acting MAC, the piston drifts when air drops - fit a rod lock or pilot check valve if the load must stay put. The CM round-end cover accepts a pivot pin directly, and LB foot or FA flange hardware can be added; magnet is standard, so CMSG / DMSG / EMSG switches need no special piston.
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 MAC40X20SCM FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. Raise supply to 0.7 MPa and those figures become 879.6 N push and 738.9 N pull. The theoretical maximum is 128.1 kgf at 1.0 MPa. Keep real working loads around 377 N for a comfortable margin.
Yes. Back both cushion needle screws off, then close them gradually until end-of-stroke impact disappears. The cylinder runs 30-800 mm/s on air filtered to 40 um, within 0.15-1.0 MPa (22-145 psi).
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SCM
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.