Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB
The AirTAC Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB is a single acting, pull type (spring extend) pen-size mini cylinder with a Ø12mm bore and 45mm stroke. A single air port drives the pull stroke; the built-in return spring resets the rod when air is released, so only one solenoid line is needed.
- BoreØ12 mm
- Stroke45 mm
- Port sizeM5×0.8
- Acting typePull, single acting
- Rod threadM10×1.0
- ReturnSpring
- 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 PTB Single Acting Pen-Type Cylinder PTB12X45CB
The AirTAC PTB12X45CB is a JIS pen-size single-acting pull cylinder with a 12 mm bore and 45 mm stroke. Air entering the single M5x0.8 port retracts the rod, while an internal spring pushes it back out upon exhaust release. This provides a fail-safe extended state during air loss, making it dependable for holding or returning tasks. It yields a usable 33.1 N net pull at 0.5 MPa.
Built with a SUS304 stainless barrel and a slim mini body, it saves space in tight jigs. The CB double clevis back cover accommodates pivoting loads. A fixed TPU bumper cushions the end caps. Because the return spring counteracts the air stroke, the rod will not move until the minimum 0.2 MPa operating pressure is reached.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB Technical Specifications
| Model | Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB |
|---|---|
| Series | PTB JIS pen-size mini cylinder |
| Bore size | Ø12 mm |
| Rod diameter | Ø5 mm |
| Stroke | 45 mm |
| Acting type | Single acting, pull type (spring extend) |
| Port size | M5×0.8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 0.7 MPa |
| Proof pressure | 1.2 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Return | Return spring (pull by air) |
| Max standard stroke | Up to 60 mm |
The spring holds the rod extended; applying air retracts it, and removing air lets the spring push the rod back out. Forces below are the NET spring-deducted values from the AirTAC thrust table. Confirm against the product label before installation.
Net Pull Force (Ø12mm)
| Pressure | Net pull force |
|---|---|
| 0.5 MPa | 33.1 N |
| 0.7 MPa (max) | 51.8 N |
These are the usable pull forces after the return spring is subtracted, taken directly from the AirTAC single-acting thrust table. Minimum operating pressure is set by the spring, so this model needs at least the lower pressure shown to move.
Model Code: Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB
| PTB | JIS pen-size single acting, pull type (spring extend) mini-cylinder series. |
|---|---|
| 12 | Bore size in mm. |
| ×45 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| R | Back cover: R axial inlet (bore-dependent). |
Mounting accessories: LB, FA, CJ. Related PB-family variants: PB (double acting), PSB (single-acting push), PBD (double rod), PBR (front-mount).
Where the Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB Is Used
Pivoting Hold-Down Clamp
Uses the CB double clevis to swing into position, applying 33.1 N net pull to secure light panels while the spring safely holds the clamp open on air loss.
Wire Belt Tensioner
Pulls a tensioning idler back against a belt during cycling. The spring-extend design ensures the belt retains tension if the air supply drops.
Retract-to-Open Gate
Air retracts the rod to pull a diverter gate closed for routing parts, then exhausts so the internal spring pushes the gate back to its open home position.
Is the Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB the Right Cylinder?
This 12 mm bore generates 33.1 N net pull at 0.5 MPa and 51.8 N at 0.7 MPa. If your task requires less force, the 10 mm bore offers 23.5 N at 0.5 MPa; for heavier loads, the 16 mm bore provides 65.0 N. The pull acts on the smaller rod-side area, so expect lower force than a matching push cylinder. Plan for a safe working load of roughly 20 N, which is about 60 percent of the 0.5 MPa rating, to account for seal friction.
The fail-safe spring holds the rod extended without live air. Note the thin Ø5 mm rod is designed for coaxial thrust, so over this 45 mm stroke or with off-axis loads, add an external guide to prevent side load. The rod-end thread is M10x1.0. Confirm the CB double clevis fits your pivot pin before ordering.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Only one air line / solenoid needed
- ✓ Fail-safe extend on air loss
- ✓ Magnet (S) for sensors?
- ✓ Stroke ≤ 60 mm (single-acting limit)
- ✓ Keep the load coaxial — avoid side load
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 0.7 MPa operating pressure.
- check Allow for spring force in the stroke direction.
- check Do not add an external return mechanism.
- check Keep the load coaxial; avoid side load on the thin rod.
- check Do not dismantle the front or back cover.
Airtac PTB Single Acting Pen-Type Cylinder PTB12X45CB FAQ
The net pull force is 33.1 N at 0.5 MPa and 51.8 N at the 0.7 MPa maximum. The internal return spring requires a minimum of 0.2 MPa before the rod begins to retract. Without air, the spring holds the rod in the fail-safe extended position.
It uses a fixed TPU bumper at each end to decelerate the last few millimeters of travel. Because it is not adjustable, meter-out the exhaust or add an external shock absorber when cycling real tooling mass at mid to high speeds. This specific model lacks a sensor magnet.
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Related AirTAC PTB Pen-Size Cylinders
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