Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20
The ACQJ40X300-20 is a double-acting, single-rod JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. This long-stroke, made-to-order variant provides a usable extend range of 280 to 300 mm, meaning the outward stroke can be shortened by up to 20 mm directly on your equipment. The retract movement remains completely unaffected by this adjustment.
Because the piston area is unchanged, the output force is identical to a standard ACQ of the same bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. The unit incorporates a fixed NBR elastomer bumper at each end for deceleration and features an M12x1.25 adjuster thread alongside a female M8x1.25 rod-end thread. The body includes sensor grooves, though this specific configuration ships without a magnet.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 – 500 mm/s |
| Rod thread | M8×1.25 (F) / M14×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
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 | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20 Is Used
Machining Fixture Stops
Dial in the exact extend position of clamping arms on machining centers within the 280-300 mm window without swapping out cylinder hardware.
Assembly Line Changeover
Adapt product pusher end stops rapidly during production run transitions on automated assembly equipment.
Packaging Machine Setup
Establish trial end positions for sealing or forming heads on packaging lines, ensuring precise depth control before locking the nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20 the Right Cylinder?
When sizing this 40 mm bore unit, dropping to a 32 mm bore reduces push force to 402.1 N at 0.5 MPa, while stepping up to a 50 mm bore increases it to 981.8 N. If your application requires a fixed 300 mm extend position without on-machine tuning, a standard ACQ cylinder will suffice. To order, confirm the 40 mm bore, 300 mm full stroke, 20 mm adjustable window, and rod-end thread type. Note that this model lacks a magnet; add the S option if reed or solid-state switch detection is needed.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20 FAQ
This 40 mm bore cylinder has a usable extend range of 280-300 mm (300 mm full stroke minus the 20 mm window). It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The retract stroke is unaffected by the extend adjuster.
The external M12x1.25 threaded stop with lock nut limits only the outward stroke length, leaving force identical to a standard ACQ since piston area is unchanged. Deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion. For high-speed or high-energy loads, consider adding an external shock absorber.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
Request a Quote for Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.