Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X450-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X450-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø50mm bore, a 450mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 430–450mm. Adjustable air cushion (both ends).
- BoreØ50 mm
- Stroke450 mm
- Adjustable430–450 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- 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 MBLCJ50X450-20S
The AirTAC MBLCJ50X450-20S is a double-acting, single-rod mini round cylinder engineered for high-force compact automation. It features a rear travel stopper allowing 20 mm of adjustment, creating a usable stroke window of 430-450 mm. Driven by a G1/4 port and a robust Ø16 hard-chrome plated carbon steel rod, it delivers 981 N of push force at 0.5 MPa. The riveted aluminum barrel keeps the body lightweight, while the heterogeneous two-way piston seal retains grease for long life.
Unlike the fixed rubber bumper found on the base MBLJ, this MBLCJ incorporates a screw-tunable adjustable air cushion at both ends. This decelerates the load near the stroke extremes, protecting the end covers during fast 30-800 mm/s cycling. The rear stopper sets the travel end but does not hold the load; plain cylinders drift without live air pressure. Because this 450 mm stroke generates significant side-load leverage on the 16 mm rod, an external guide is strongly recommended to prevent rod bending.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X450-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X450-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø50 mm |
| Nominal stroke | 450 mm |
| Adjustable window | 430–450 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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 500 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 MBLCJ50X450-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 MBLCJ50X450-20S Is Used
Injection Mold Ejection
Provides 981 N of push force at 0.5 MPa to eject plastic parts, using the 430-450 mm adjustable window to dial in the exact ejection distance without repositioning the mold.
Woodworking Clamp Deceleration
The adjustable air cushion smoothly decelerates the 450 mm stroke at high speeds, preventing end-cover damage when clamping heavy wooden panels for routing.
Long-Travel Lever Actuation
Uses the 1374 N push force at 0.7 MPa to pivot long mechanical arms through a precise arc, relying on the external guide to manage side-load leverage on the 16 mm rod.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X450-20S the Right Cylinder?
Stepping down in bore, the 40 mm variant offers 628 N push at 0.5 MPa, suitable if your load requires less thrust. Stepping up, the 63 mm variant provides 1558 N for heavier mechanisms. Choose MBLCJ over the MBLJ when your application speed demands tunable end-of-stroke cushioning rather than a fixed bumper, or over the MBLC if you need to fine-tune the end position by up to 20 mm. Mounting is restricted to Basic, FA flange, or LB foot; there is no SDB pivot or back-cover option. To replace this exact unit, match the 50 mm bore, 450 mm stroke, 20 mm adjust code, PT thread, and the -S magnet. The built-in magnet supports AirTAC CMSG reed switches, as well as DMSG and EMSG solid-state electronic sensors for position detection.
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 MBLCJ50X450-20S FAQ
At 0.5 MPa, it pushes with 981 N and pulls with 881 N. At 0.7 MPa, push force is 1374 N, with a theoretical maximum of 200 kgf at 1.0 MPa. The rear adjuster trims up to 20 mm of travel, giving a usable stroke window of 430-450 mm.
No, neither the cushion nor the adjuster is a lock. The rear stopper sets the travel end position, and the adjustable air cushion only decelerates the piston near the stroke ends. To hold a load securely without continuous air pressure, an external locking device is required.
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.
Related AirTAC Adjustable-Stroke Cylinders
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