Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-75S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-75S 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 75mm for a usable window of 175–250mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke250 mm
- Adjustable175–250 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 MBLCJ20X250-75S
The AirTAC MBLCJ20X250-75S 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 push and 132 N pull force at 0.5 MPa. The rear stopper allows you to trim up to 75 mm of travel, creating a usable 175-250 mm stroke window for precise end-positioning. A built-in magnet (-S) supports CMSG reed and DMSG/EMSG electronic sensors for rod detection.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke cushioning to decelerate faster or heavier moves, protecting the end covers. The riveted rolling-packed barrel and 20 µm hard-chrome plated Ø8 carbon-steel rod provide durable service in tight spaces. Note that the adjustment screw is a travel stop, not a load lock; the cylinder cannot hold position without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-75S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-75S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 175–250 mm (trim 75 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 MBLCJ20X250-75S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ20X250-75S Is Used
PCB Router Z-Axis
Drives the plunge depth on a PCB depaneling router, using the 175-250 mm window to dial the exact cutting depth while the air cushion softens the rapid tool retraction.
Label Applicator Tamper
Feeds and tamps labels onto small pharmaceutical cartons, relying on the 157 N push force and the rear stopper to prevent over-travel crushing the packaging.
Textile Yarn Guide
Traverses a yarn guide carriage across a narrow weaving loom, where the adjustable cushion absorbs the kinetic energy of the 250 mm stroke to prevent end-cover shock.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X250-75S the Right Cylinder?
At 0.5 MPa, this 20 mm bore yields 157 N push force. If you need less force, step down to the 12 mm bore (confirm from datasheet), or step up to the 25 mm bore which provides 245 N push. Choose this MBLCJ over the MBLJ when your application requires tunable end-deceleration rather than a fixed bumper, or over the MBLC when you need the 75 mm rear travel adjustment window.
The rear adjuster sets the travel end-point and the air cushion only manages deceleration; neither will lock or hold a load statically. Mounting is limited to Basic, FA (flange), or LB (foot) styles; there are no SDB pivot or back-cover options. For an exact replacement, match the 20 mm bore, 250 mm stroke, 75 mm adjust code, G1/8 port, PT thread, and the -S magnet. Because the stroke is 250 mm on an 8 mm rod, 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 MBLCJ20X250-75S FAQ
At 0.5 MPa, the 20 mm bore provides 157 N push and 132 N pull. At 0.7 MPa, push increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The rear adjuster physically stops the piston to set your travel end-point within the 175-250 mm window. The adjustable air cushion uses a screw needle valve to tune deceleration speed near the covers. Neither holds the load statically; a separate lock is needed for position holding.
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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