Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X100-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X100-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm bore and 100mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke100 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM8×1.25
- 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 MAJ20X100-40S
Where a repeat position shifts between batches, the MAJ20X100-40S answers with a 40 mm adjustable window on its extend stroke, set by the external stop screw without touching the air circuit. The 20 mm bore develops 157 N at 0.5 MPa going out and 131.9 N coming back, reaching 219.8 N and 184.7 N at 0.7 MPa; 32 kgf is the theoretical maximum at 1.0 MPa.
Keep steady loads near 94 N at 0.5 MPa - about 8 kg vertical lift with a 2:1 margin - and the cylinder will hold that duty all shift. Its stainless barrel, riveted covers and 20 um hard-chrome plated rod resist corrosion in wet or dusty plants, and the built-in magnet means position feedback through CMSG / DMSG / EMSG switches needs no add-ons or special-order piston.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X100-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X100-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 100 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MAJ20X100-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×100 | Stroke length in mm. |
| -40 | 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 MAJ20X100-40S Is Used
Label press roller
Presses a nip roller onto labels on a semi-automatic labeller. The 40 mm window covers tall and short containers on one head, and roughly 94 N of working force gives even label pressure without crushing.
Vial tray index stop
Positions an index stop on a pharmaceutical vial tray line, where switch feedback is required: the standard magnet drives a CMSG switch for stop-in-position confirmation, and the stainless build suits clean, frequently wiped surfaces.
Greenhouse vent pusher
Opens light vent panels on a commercial greenhouse. The chrome-plated rod and stainless tube stand up to irrigation spray and sun exposure, and the trimmed extend end keeps the panel from over-travelling in gusts.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X100-40S the Right Cylinder?
With 157 N push at 0.5 MPa this bore doubles the 16 mm output of 100.5 N and stays under the 25 mm figure of 245.3 N - match it to loads up to about 94 N continuous. Mount with the FA flange or LB foot and add I or Y rod knuckles where the linkage needs articulation. For a 100 mm stroke keep side loads off the 8 mm rod or take them out on an external guide; the trim screw is an end stop, not a mid-stroke brake.
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 MAJ20X100-40S FAQ
At 0.5 MPa: 157 N push and 131.9 N pull. At 0.7 MPa: 219.8 N push and 184.7 N pull. The theoretical maximum for this 20 mm bore is 32 kgf at 1.0 MPa. The cylinder operates on 0.15-1.0 MPa (22-145 psi) air, proof tested to 1.5 MPa (215 psi), with rod speeds of 30-800 mm/s.
It cannot. The external screw only defines where the extend stroke ends within the 40 mm window; it is a mechanical stop, not a clamp. If pressure drops, the load can drive the 8 mm rod back, so add an external lock or a holding valve circuit wherever true position retention matters.
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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