Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X30-30S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X30-30S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 30mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke30 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM12×1.25
- 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 MAJ40X30-30S
Set the stop screw once and this cylinder repeats that exact extend length run after run: the MAJ40X30-30S gives a 30 mm stroke with a 30 mm trim window, the widest trim range AirTAC offers for this bore, on a double-acting 40 mm mini delivering 628 N of push at 0.5 MPa.
Construction is the MA signature: a stainless round barrel rolled onto aluminium covers, with a hard-chrome plated carbon-steel rod at 20 um that tolerates outdoor yards and wash-prone cells. Operating window is 0.15-1.0 MPa (22-145 psi), proof tested at 1.5 MPa (215 psi), rod speeds 30-800 mm/s. Full push at 0.5 MPa equals about 64 kg of vertical lift; plan real jobs near 32 kg for a 2:1 safety margin, and note the magnet is standard so sensor drops are zero special-order.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X30-30S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X30-30S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 mm |
| Acting type | Double acting, adjustable stroke |
| 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 | Fixed anti-impact bumper pads |
| 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X30-30S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | Stroke length in mm. |
| -30 | 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 MAJ40X30-30S Is Used
Crimping head on tube lines
Crimp aluminium tube ends on cosmetic or pharmaceutical lines; the full 30 mm window covers the deepest and shallowest crimp heights on one cylinder.
Pallet-stop actuator
Raise and drop a pallet stop in a warehouse cell - 628 N at 0.5 MPa lifts the stop bar briskly against spring return.
Lab mixer lid latch
Hold a mixing-vessel lid closed during blend cycles; the riveted stainless body tolerates routine wipe-down in the lab.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X30-30S the Right Cylinder?
Compare before you buy: a 32 mm MAJ makes 402 N at 0.5 MPa, so pick it unless your clamp or press genuinely needs this bore's 628 N. The adjuster is an end-stop for the extend direction only - de-pressurise the cylinder and the load will coast, it is not a mid-stroke lock. Choose FA flange or LB foot mounting, I or Y knuckles at the rod; SDB is not offered on the adjustable version. Port is 1/8" on this 40 mm bore.
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 MAJ40X30-30S FAQ
At 0.5 MPa: 628 N push, 528 N pull. At 0.7 MPa: 880 N push, 739 N pull. Theoretical maximum at 1.0 MPa works out to 128 kgf on the extend stroke.
The 40 mm bore uses 1/8" air ports and an M12x1.25 male rod thread, with a 16 mm hard-chrome plated rod. PT comes standard, with G and NPT thread options available.
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.
Request a Quote for Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X30-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.