Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 230–250mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke250 mm
- Adjustable230–250 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 MBLCJ20X250-20
The AirTAC MBLCJ20X250-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and twin adjustable air cushions. The rear stopper trims up to 20mm of travel, providing a usable stroke window of 230-250mm. Driven by an 8mm carbon-steel rod through a G1/8 port, it delivers 157N push and 132N pull at 0.5 MPa. This 250mm stroke is well-suited for long-reach actuation in tight assembly spaces.
Unlike the base MBLJ which relies on a fixed rubber bumper, this SKU uses screw-tunable end-of-stroke cushions to decelerate faster or heavier loads, protecting the end covers. The riveted rolling-packed barrel and grease-retaining piston seal ensure durable, low-friction operation. Note that this specific code lacks the -S magnet, meaning it cannot accept CMSG, DMSG, or EMSG position sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 230–250 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 MBLCJ20X250-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×250 | 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 MBLCJ20X250-20 Is Used
PCB Edge Router Gate
Extends 250mm to open a protective guard on a PCB depaneling router, using the 230-250mm window to dial in the exact open position and the air cushion to prevent slamming the aluminum cover.
Microfluidic Valve Indexing
Cycles a ceramic slide valve in a microfluidic diagnostic cartridge tester, where the 157N push force seats the cartridge and the tunable cushion halts the 8mm rod smoothly without cracking the ceramic.
Label Applicator Diverter
Pushes a diverter arm across a 250mm web path in a label printer, relying on the compact 20mm body to fit the tight frame while the cushion slows the 132N pull to protect the film path.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-20 the Right Cylinder?
For lower force needs, the 20mm bore is the smallest available, so stepping down is not an option. If your application requires more thrust, step up to the 25mm bore which yields 245N push at 0.5 MPa. Choose this MBLCJ over the MBLJ when your moving mass requires tuned deceleration rather than a hard bumper impact, or over the MBLC if you need the 230-250mm travel flexibility.
Remember that the rear adjuster is a mechanical travel stop, not a load-holding lock; the cylinder will drift without live air pressure. Mounting is limited to Basic, FA flange, or LB foot styles (no SDB pivot or back-cover options). At 250mm stroke on an 8mm rod, you must use an external guide to prevent rod bending and premature seal wear. Replacement matching requires bore 20, stroke 250, 20mm adjust, G1/8 PT thread, Basic mount, and no 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 MBLCJ20X250-20 FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N push and 132N pull. At 0.7 MPa, push increases to 220N. The maximum theoretical force is 32 kgf at 1.0 MPa.
No. The rear adjustment screw is a travel stop that sets the stroke end position (230-250mm window); it does not hold the load. The adjustable air cushion only governs deceleration speed. Neither feature locks the rod, which will drift without 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
Request a Quote for Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.