Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 225mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 175–225mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke225 mm
- Adjustable175–225 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 MBLCJ20X225-50S
The AirTAC MBLCJ20X225-50S 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 at 0.5 MPa via an 8 mm hard-chrome plated carbon-steel rod. The 50 mm adjustment code lets you trim the rear travel, creating a usable stroke window of 175 to 225 mm, which is ideal for fine-tuning end positions on packaging machinery.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air cushions to decelerate the rod near each end cover, absorbing impact for faster cycling. The riveted rolling-packed aluminum barrel and two-way grease-retaining piston seal keep the body light for tight spaces. Fitted with a built-in magnet (-S), it supports CMSG reed and DMSG or EMSG solid-state sensors for position detection. Note that the rear stopper sets the travel end but does not lock the load, and the overall length extends by the adjustment distance.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 225 mm |
| Adjustable window | 175–225 mm (trim 50 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 MBLCJ20X225-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×225 | Nominal stroke length in mm. |
| -50 | 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 MBLCJ20X225-50S Is Used
Flow Wrapper End-Seal
Tunes the 175-225 mm stroke to precisely press and cut film end-seals on continuous flow wrappers, using the air cushion to protect the seal jaw from impact at high cycle rates.
PCB Router Clamp
Adjusts rear travel to hold printed circuit boards during routing, relying on the 157 N push force and tunable deceleration to prevent sudden shocks to the delicate fiberglass panel.
Textile Loom Guide
Trims the stroke window for guiding yarn carriers in narrow textile loom frames, where the compact riveted barrel fits tight warp shed spaces and the cushion softens reversal.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50S the Right Cylinder?
If 157 N is too high, stepping down is not an option as 20 mm is the smallest available bore in this series. Stepping up to the 25 mm bore increases your push force to 245 N at 0.5 MPa, offering a stronger alternative if your payload grows. Choose this MBLCJ over the MBLJ when your application requires tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC if you need the 175-225 mm travel adjustability rather than a fixed stroke.
Remember that neither the rear travel stopper nor the air cushion acts as a load lock; the rod will drift without live air pressure, so external holding is needed for fail-safe positioning. Mounting is limited to Basic, FA flange, or LB foot brackets, as no SDB pivot or back-cover options exist for this profile. To match this exact replacement, specify the 20 mm bore, 225 mm stroke, 50 mm adjust code, G1/8 PT port, and the -S magnet. With a 225 mm stroke on an 8 mm rod, you must use an external guide to prevent rod bending and side-load damage.
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 MBLCJ20X225-50S FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N push and 132 N pull force. At 0.7 MPa, the push force is 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa operating pressure.
The 50 mm adjustment is a mechanical rear stopper that limits travel to a 175-225 mm window, setting the exact end position. The adjustable air cushion is a separate screw-tunable valve that controls rod deceleration near the covers. Neither holds the load in place.
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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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