Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-10S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-10S 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 10mm for a usable window of 240–250mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke250 mm
- Adjustable240–250 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 MBLCJ20X250-10S
The AirTAC MBLCJ20X250-10S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. The rear stopper allows you to trim up to 10 mm of travel, creating a usable end-position window from 240 mm to 250 mm for precise mechanical timing.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air deceleration to protect the end covers during faster cycling. The riveted rolling-packed barrel pairs with a heterogeneous two-way grease-retaining piston seal, while the Ø8 mm carbon-steel rod features 20 µm hard-chrome plating to resist wear. Because the -S magnet is fitted, you can track rod position along the 250 mm travel using CMSG reed or DMSG/EMSG electronic sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-10S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-10S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 240–250 mm (trim 10 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 MBLCJ20X250-10S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -10 | 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 MBLCJ20X250-10S Is Used
PCB Drill Stroke Timing
Uses the 240-250 mm adjustable window to set exact Z-axis lowering depth on a PCB drilling spindle, leveraging the tunable cushion to prevent impact bounce on the 157 N stroke end.
Label Dispenser Tensioning
Deploys the Ø8 mm hard-chrome rod to maintain precise tracking on a web-guiding roller, using the DMSG electronic sensor to verify the 250 mm travel completion before cutting.
Thin Film Squeegee Return
Drives a 250 mm sweep on a screen-printing squeegee, relying on the adjustable air cushion to decelerate the heavy frame smoothly without snapping the lightweight aluminum barrel.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-10S the Right Cylinder?
If you need less force, the neighbouring Ø16 bore offers lower output, while stepping up to the Ø25 bore provides 245 N of push force at 0.5 MPa—useful if your payload exceeds the 157 N threshold. Choose this MBLCJ over the MBLJ when your end-of-stroke impact requires tunable cushioning rather than a fixed bumper, or over the MBLC when you need that 10 mm rear adjustment window instead of a fixed 250 mm stroke.
Remember that the rear adjuster is a travel stop, not a lock; it sets the end point but cannot hold the load dynamically, and the cushion only decelerates. Mounting is limited to Basic, FA, or LB—no SDB pivot or back-cover options exist. At 250 mm, the overall length (A + 2 x stroke + adjust) stretches significantly; with the small Ø8 mm rod, you must use an external guide to prevent rod bending and side-load damage. To replace this SKU exactly, match bore 20, stroke 250, adjust 10, port G1/8, 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 MBLCJ20X250-10S FAQ
At 0.5 MPa it provides 157 N push and 132 N pull force, increasing to 220 N push at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa. The 250 mm stroke is within the 300 mm maximum standard stroke limit for the Ø20 bore.
The 10 mm adjustable stroke is a rear mechanical stopper that trims the usable travel window down to 240-250 mm; it does not lock or hold the load. The adjustable air cushion is a separate screw-tunable valve that controls end-of-stroke deceleration to soften impact, not to brake the cylinder.
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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