Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X175-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X175-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 175mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 155–175mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke175 mm
- Adjustable155–175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- 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 MBLCJ40X175-20S
The AirTAC MBLCJ40X175-20S is a compact double-acting mini cylinder featuring a rear stroke adjuster and tunable air cushions at both ends. The 20 mm rear trimmer creates a usable travel window of 155 to 175 mm, allowing you to dial in the exact end position without mechanical shims. Driven by a Ø16 mm hard-chrome rod, it delivers 628 N of push force at 0.5 MPa, making it well suited for mid-weight tooling pushes and forming strokes.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke deceleration to absorb kinetic energy from faster cycles, protecting the aluminum end covers. The riveted rolling-packed barrel retains grease via a heterogeneous two-way piston seal. The built-in magnet (-S) enables direct mounting of CMSG reed or DMSG/EMSG electronic sensors for position feedback.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X175-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X175-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 175 mm |
| Adjustable window | 155–175 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 500 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 MBLCJ40X175-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 MBLCJ40X175-20S Is Used
Stator Winding Press
Provides 628 N of precise push force at 0.5 MPa to seat copper stator windings, using the 155-175 mm window to perfectly tune the bottoming depth.
Thermoforming Mold Stop
Uses the dual adjustable air cushions to smoothly decelerate a heavy plastic sheet forming platen, preventing shock loads on the mold cavity.
PCB Depaneling Saw Feed
Feeds a circular saw blade across 175 mm of travel, relying on the -S magnet and DMSG electronic sensor to trigger the blade motor at the precise cut start.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X175-20S the Right Cylinder?
Choose this 40 mm bore when you need 628 N of push force at 0.5 MPa. If your payload is lighter, step down to the 32 mm bore (402 N push); for heavier tooling, step up to the 50 mm bore (981 N push). The adjustable stroke stopper sets the travel end but does not hold the load against drift, so external locking is required for fail-safe positioning. Mounting is limited to Basic, FA flange, or LB foot; there is no SDB pivot or back-cover option available for this series.
When ordering a replacement, verify the 40 mm bore, 175 mm stroke, 20 mm adjust code, G1/4 port, PT thread form, and the -S magnet. The overall length equals A + 2 x stroke + adjust. At 175 mm of travel, the Ø16 mm rod is susceptible to side-load bending; always guide the load externally to prevent premature seal wear.
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 MBLCJ40X175-20S FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The rear stroke adjuster physically limits the rod travel to a 155-175 mm window, acting as a mechanical stop. The adjustable air cushion uses a needle screw to tune the rate of pneumatic deceleration near the end of the stroke to absorb kinetic energy. Neither feature locks the rod in place; external holding is needed to maintain position.
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 MBLCJ40X175-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.