Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 105–125mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke125 mm
- Adjustable105–125 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
- 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 MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S
The AirTAC MBLCJ20X125-20S is a compact double-acting aluminum mini cylinder featuring a rear adjustable stroke and a tunable air cushion at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. The built-in magnet (-S) supports CMSG, DMSG, and EMSG sensor switches for precise position detection.
This specific SKU allows you to trim up to 20 mm of travel at the rear, creating a usable stroke window of 105 to 125 mm. The riveted rolling-packed aluminum barrel and 20 µm hard-chrome plated carbon-steel rod provide durable service. The adjustable air cushion lets you screw-tune end-of-stroke deceleration to protect the end covers during faster moves, while the rear stopper sets your travel end without locking the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 105–125 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| 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 | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 300 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -20 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S Is Used
PCB Depaneling Saw Feed
Drives a circular blade carriage through scored circuit boards; the 105-125 mm adjustable window sets the exact cut depth, while the 157 N push force cleanly slices FR4 fiberglass substrates.
Bottle Capper Turret
Indexes a capping head onto plastic bottle threads; the tunable air cushion softens the 125 mm extension stop to prevent cracking thin-walled PET caps at high cycle rates.
Wire Straightener Cut-off
Feeds copper wire through a die before a shear cuts it; the 132 N pull force retracts the clamp, and the built-in magnet triggers a DMSG solid-state sensor to confirm the wire is stripped.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S the Right Cylinder?
Stepping down to the 20 mm bore is your best option when a 16 mm bore cannot provide enough thrust, though you would step up to a 25 mm bore (245 N push @0.5 MPa) if you need significantly more force. Choose this MBLCJ over the MBLJ when you need tunable air cushioning instead of a fixed rubber bumper, or over the MBLC when you require the 105-125 mm adjustable travel window. Remember that the rear adjuster is a travel stop, not a lock; the cylinder cannot hold position without live air. Mounting is limited to Basic, FA, or LB; no SDB or back-cover options exist. For a direct replacement, match the 20 mm bore, 125 mm stroke, 20 mm adjust code, G1/8 port, PT thread, and the -S magnet.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X125-20S FAQ
At 0.5 MPa, the push force is 157 N and the pull force is 132 N. At 0.7 MPa, the push force is 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The adjustable stroke lets you trim up to 20 mm at the rear, giving a usable travel window of 105 to 125 mm. The adjustable air cushion is a screw-tunable valve that controls end-of-stroke deceleration. Neither feature locks the load; the rod drifts without live air pressure.
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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