
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X30-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø16mm bore and 30mm stroke, M5×0.8 air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
Short-stroke positioning gets simpler with the 20 mm trim window: the rod still travels 30 mm full, but the stop screw shortens the extend stroke to match each fixture, no re-plumbing needed. At 0.5 MPa the 16 mm bore pushes 100.5 N (140.7 N at 0.7 MPa) and pulls back at 86.4 N.
The rolling-packed construction - stainless tube, aluminium covers, hard-chrome rod - resists corrosion in humid or food-adjacent areas. Fixed anti-impact pads quiet the stroke ends without adding an air-circuit cushion. Budget about 60 N for real work at 0.5 MPa, or roughly 5 kg of vertical lift with a 2:1 margin.
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X30-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø16 mm |
| Stroke | 30 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.
| 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.
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×30 | 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.
Knocking single screws or caps off a vibratory bowl exit track; 100.5 N at 0.5 MPa is ample for gram-class parts.
A brief 20 mm working stroke that presses labels onto vials, trimmed on site so dwell height matches each container.
Driving a latch on small instrument drawers, with an EMSG switch confirming closed position from the standard magnet.
Bore 16 offers 100.5 N at 0.5 MPa; the next step, MAJ20, reaches 157 N, so size up when the duty cycle heats the air or line pressure sags. The 20 mm window is trim-only - it shortens the extend stroke and works as an end-stop, never as a brake, so a piston drifting under gravity still needs external stops. The standard magnet pairs with CMSG / DMSG / EMSG switches; mounting is FA flange or LB foot, with I and Y rod knuckles available.
Quick checklist
At 0.5 MPa it pushes 100.5 N and pulls 86.4 N; at 0.7 MPa the numbers are 140.7 N and 120.9 N. Maximum theoretical force is 20.5 kgf at 1.0 MPa. Supply 0.15-1.0 MPa (22-145 psi) air filtered to 40 um and run the rod at 30-800 mm/s.
The anti-impact bumper pads are fixed - they soften end-of-stroke deceleration but are not an adjustable air cushion; that feature belongs to the MACJ family. What you can adjust is the extend stroke itself, trimmed by up to 20 mm via the external stop screw.
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