Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20SLB
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20SLB is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø20mm bore and 125mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ20 mm
- Stroke125 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 MAJ20X125-20SLB
Foot mounting changes the install: the LB base bolts flat to a machine plate or welded frame, so the MAJ20X125-20SLB lines up without machined bosses. Underneath sits the same adjustable platform - double acting, with a stop screw trimming the extend stroke across a 20 mm window (105-125 mm effective). The 20 mm bore pushes 157 N and pulls 131.9 N at 0.5 MPa, running 30-800 mm/s on 0.15-1.0 MPa (22-145 psi) air, magnet fitted as standard.
Corrosion resistance is where this round body earns its keep: stainless barrel, hard-chrome rod plating and rolled aluminium covers hold up in humid shops, splash zones and outdoor rigs that eat painted minis. Anti-impact bumper pads are fixed at each stroke end - they soften the stop but are not adjustable cushions. In practice that means about 94 N of honest working force at 0.5 MPa, or roughly 8 kg lifted vertically at a 2:1 margin.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20SLB Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20SLB |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MAJ20X125-20SLB
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MAJ20X125-20SLB Is Used
Packaging line gate
Swinging or pushing a divert gate on a snack-food bagger, where foot mounting suits a welded frame and 157 N at 0.5 MPa clears the load.
Machine plate clamping
Pressing a small cover or plate during screw-driving stations; the 20 mm trim window absorbs part height variation between SKUs.
Low-profile index stop
A bolt-down stop that halts pallets on a transfer conveyor; the foot mount seats directly on the frame rail.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ20X125-20SLB the Right Cylinder?
When 157 N at 0.5 MPa is marginal, step to bore 25 and its 245.3 N; when it is generous, bore 16 at 100.5 N saves space and air. Note the LB feet carry side loads through their bolts - shim and align the foot plane to protect the 8 mm rod across the 125 mm span. The stop screw trims extend only and acts as a stop, never a brake: an unpowered rod still moves. Add I or Y knuckles or the FA flange variant if the fixture prefers them, and drop a CMSG switch onto the standard magnet for end-of-stroke confirmation.
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 MAJ20X125-20SLB FAQ
Bore 20, so 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. Theoretical ceiling is 32 kgf at 1.0 MPa. Size real loads around 94 N at 0.5 MPa for dependable service.
Internals are identical - stainless barrel, hard-chrome rod, fixed bumpers, built-in magnet - but the LB feet bolt this 125 mm stroke body straight onto flat frames or T-slot plates, easing alignment. Mount alternatives are the FA flange plus I and Y rod knuckles.
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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