Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 50mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 30–50mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke50 mm
- Adjustable30–50 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 MBLCJ20X50-20
The AirTAC MBLCJ20X50-20 is a compact double-acting aluminum mini cylinder featuring a rear adjustable stroke and an adjustable air cushion at both ends. With a 20mm bore, it delivers 157N push and 132N pull at 0.5 MPa. The rear adjuster allows you to trim up to 20mm of travel, creating a usable stroke window of 30-50mm for precise end-positioning.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air cushioning to decelerate the rod smoothly near each end, protecting the end covers during faster cycles. The riveted rolling-packed barrel and grease-retaining piston seal keep it compact for tight spaces. This SKU uses a standard PT port thread and lacks the -S magnet option, meaning it cannot accept a CMSG or DMSG position sensor.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 30–50 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 MBLCJ20X50-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MBLCJ20X50-20 Is Used
Micro-Clamp Release
Delivers 157N to release small electronic component clamps on a PCB routing fixture, using the 30-50mm window to absorb mechanical variance.
Valve Stem Seating
Tunes the seating force of a 15mm pneumatic valve stem during assembly, relying on the adjustable air cushion to prevent impact damage.
Pick-and-Place Ejector
Acts as a compact ejector for small plastic parts in a packaging machine, operating at 30-800 mm/s with smooth end-of-stroke damping.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20 the Right Cylinder?
Stepping down is not an option as 20mm is the smallest available bore. If you need more force, the 25mm bore provides 245N push at 0.5 MPa. Choose this MBLCJ over the MBLJ when your cycle speeds require tunable end-of-stroke deceleration rather than a fixed bumper. Remember the rear adjuster is a travel stop, not a lock; it will not hold a load without live air pressure. Mounting is limited to Basic, FA, or LB (no SDB or back cover). For a direct replacement, match bore 20, stroke 50, adjust 20, G1/8 port, PT thread, and no magnet. The Ø8 rod handles short moves well, but long strokes require an external guide to prevent bending.
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 MBLCJ20X50-20 FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N push and 132N pull force. At 0.7 MPa, the push force is 220N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The adjustable stroke lets you mechanically trim the travel end-point via a rear stopper (usable window 30-50mm), while the adjustable air cushion uses a screw to tune end-of-stroke deceleration. Neither holds the load in place without continuous 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.
Related AirTAC Adjustable-Stroke Cylinders
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