Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø16mm bore and 40mm stroke, M5×0.8 air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ16 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- CushionFixed anti-impact bumper pads
- 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S
Ten millimetres of extra tuning often settles a fixture debug, and the MAJ16X40-20S supplies a 20 mm adjustable window on a 40 mm double-acting stroke. The external stop screw shortens the extend stroke on site; it never lengthens travel past the ordered 40 mm. Push at 0.5 MPa is 100.5 N against 86.4 N pull - roughly 60 N of practical push, or a 5 kg vertical lift with a 2:1 margin - rising to 140.7 N push at 0.7 MPa and a 20.5 kgf theoretical peak at 1.0 MPa.
AirTAC rolls the aluminium covers and a stainless block onto the steel barrel, so the compact round body keeps its seal without tie-rod hardware. Fixed anti-impact pads take the sting out of both stroke ends, though they are not adjustable cushions. The rod is 6 mm hard-chrome steel, porting is M5x0.8, and the standard magnet pairs with CMSG, DMSG or EMSG switches for end-of-stroke sensing.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø16 mm |
| Stroke | 40 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 | Fixed anti-impact bumper pads |
| Max standard stroke | Up to 300 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 (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 101 N | 86 N |
| 0.7 MPa | 141 N | 121 N |
| Max (@1.0 MPa) | 21 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -20 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S Is Used
Depth stop on a bench tapping jig
Sets tapping depth per part with the 20 mm trim window; about 60 N of working push feeds the tap without over-forcing small threads.
Flap tucker at a compact case sealer
Folds minor carton flaps through a 40 mm arc; fixed bumpers quiet the fold across 30-800 mm/s line speeds.
Jig lift on a small assembly sled
Raises about 5 kg of jig weight vertically with margin to spare; LB foot mounting tucks the cylinder beneath the sled deck.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S the Right Cylinder?
Budget about 60 N of useful push from the 100.5 N nominal rating at 0.5 MPa, and check retraction too: 86.4 N on the pull side. If the task outgrows this bore, the 20 mm size offers 157 N push and the 25 mm size 245 N. The 20 mm window trims the extend stroke shorter via the stop screw; it cannot add travel beyond 40 mm, and it does not hold position when air pressure drops.
Pick FA flange or LB foot mounting for the body and an I or Y knuckle for the rod end - adjustable models carry no SDB twin-rod variant. Sensing needs no accessories either: the magnet sits in the piston as standard, ready for CMSG, DMSG or EMSG switches.
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 Bumper models: keep speed within the rated range.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X40-20S FAQ
Push is 100.5 N and pull 86.4 N at 0.5 MPa; at 0.7 MPa push reaches 140.7 N and pull 120.9 N; the theoretical peak is 20.5 kgf at 1.0 MPa. Connections: M5x0.8 air port, M6x1.0 male rod thread, 6 mm rod, 0.15-1.0 MPa (22-145 psi) working pressure, 30-800 mm/s speed.
The barrel is stainless steel with covers rolled on, leaving no tie-rod seams to trap residue, and the hard-chrome plated rod wipes clean easily. Standard magnets still accept CMSG, DMSG or EMSG switches, and FA flange or LB foot mounting suits compact stainless fixture plates.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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