bird PIEZO SYSTEMS, INC.
65 Tower Office Park    Woburn,    MA   01801   USA
Tel: 781-933-4850    Fax: 781-933-4743    email: sales@piezo.com

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explanation of PART NUMBERS for piezoelectric benders and extenders
It is important to note that the same 2-layer piezoelectric transducer can be used as either a bending motor, a bending generator, an extending motor, an extending generator, a 2-layer stack motor and a 2-layer stack generator. Part numbers pertain to geometry and construction rather than mode of operation.

The part number describes the mounting arrangement, part thickness, piezoceramic material, reinforcement material, size, polarization, and usage.
EXPLANATION OF PART NUMBERS
Mounting
Style


Number
of Piezo
Layers
Thickness
Designation


Piezoceramic
Material


Reinforcement
Material
(Center Shim)
Size


Polar-
ization


Usage






T ... Unmounted
Q ... Quick-Mounted
D . Double Quick-Mounted



2
4




15
19
20
23
26
34
- A4
- H4
- A3



blank ... Brass
CL . High performance
NM ... Non-magnetic
SS ... High strength
NO ... No shim

-103
-203
-303
-503



X-poled
Y-poled




B - Bender
E - Extender




PART NUMBER Example 1
T
2
15
- A4
-
-103
X

This is an unmounted 2-piezo layer transducer, made with PSI-5A4E piezoceramic (nickel electrodes) and a brass center reinforcement. It is 1.25" long, 0.125" wide, and .015" thick, and is X-poled. It may be used as:
a bending motor poled for 2-wire series operation,
a bending generator poled for 2-wire series operation,
an extension motor poled for 3-wire parallel operation,
an extension generator poled for 3-wire parallel operation,
a stack motor poled for 3-wire parallel operation, or
a stack generator poled for 3-wire parallel operation.
PART NUMBER Example 2
D
2
20
- A4
SS
-503
Y
B
This is a transducer with 2-piezo layers, made with PSI-5A4E piezoceramic (nickel electrodes) and a stainless steel center reinforcement. It is 2.50" long, 1.25" wide, .020" thick, and is Y-poled. It could be used as:
a bending motor poled for 3-wire parallel operation,
a bending generator poled for 3-wire parallel operation,
an extension motor poled for 2-wire series operation, or
an extension generator poled for 2-wire series operation.
However, the "D" for the mounting style indicates it has been pre-wired and has had mounts attached to the front and back ends. The "B" for useage indicates it is intended to be used as a bender. Therefore, it could be used as:
a bending motor poled for parallel operation, or
a bending generator poled for parallel operation.
MOUNTING STYLES
T - Transducer elements consist of the transducer alone. They are not mounted or wired.
Q - Quick-Mounts are pre-wired and mounted on one end.
D - Double Quick-Mounts are pre-wired, and mounted on both ends.


NUMBER OF PIEZO LAYERS
As layers are added, the volume of piezoceramic increases. Greater volume produces greater energy output in roughly the same space.
2 - The transducer has 2 piezo layers. This is the most common structure.
4 - The transducer has 4 piezo layers.
THICKNESS
The third and fourth positions indicate the total thickness of the transducer element:
15 - .015" (.38mm)
19 - .019" (.48mm)
20 - .020" (.51mm)
23 - .023" (.58mm)
26 - .026" (.66mm)
34 - .034" (.86mm)
PIEZOCERAMIC MATERIAL
A4
PSI-5A4E is an industry type 5A (Navy Type II) piezoceramic. Thin vacuum sputtered nickel electrodes produce extremely low current leakage and low magnetic permeability. 5A has a wide temperature range and is most insensitive to temperature.




H4
PSI-5H4E is an industry type 5H (Navy Type VI) piezoceramic. It has a high motion/volt and charge/newton rating, which is useful when voltage or force is limited. Thin vacuum sputtered nickel electrodes produce extremely low current leakage and low magnetic permeability. However, its temperature range is limited and its properties are more sensitive to temperature.





A3
PSI-5A3 is an industry type 5A (Navy Type II) piezoceramic. It has non-magnetic electrodes. It has a wide temperature range and is most insensitive to temperature.
REINFORCEMENT MATERIAL
Typically, the center shim reinforcement material does not affect performance. Rather, it enhances other properties such as strength, thermal range, and magnetism. The exception is the composite reinforced shim (used in our High Performance elements) which provides higher motion, force, and response.
blank:
(Brass)
Economic, non-magnetic, and suitable for a wide variety of uses.


SS:
(Stainless Steel)
High strength, suitable for cryogenic and vacuum use.


CL:
(Composite)
High performance shim offers highest motion, force and response.


NM:
(Non-Magnetic)
Fabricated using non-magnetic electrodes and non-magnetic reinforcing material.


NO:
(No Shim)
Because they have no center shim, they are not intended to be center accessed.


STANDARD SIZE DESIGNATIONS
sizes
Size
Width
Length
Designations
Inches
(mm)
Inches
(mm)
- 103
- 203
- 303
- 503
.125
.250
.500
1.250
(3.2)
(6.4)
(12.7)
(31.8)
1.250
1.250
1.250
2.50
(31.8)
(31.8)
(31.8)
(63.5)
Custom sizes can be made to order.
Please contact our sales department for a quote.
POLARIZATION
2-layer piezo transducers may have their layers poled in opposite directions (X-poled), or poled in the same direction (Y-poled).
X-poled



X-poled
Y-poled



Y-poled
Both polarization and wiring determine whether the element operates in serial mode or parallel mode. Parallel mode requires that the center shim be accessed so that a third wire may be attached.
series poled bender
parallel poled bender
2-Layer Bending Element
X-poled for Series Operation (2-wire)
2-Layer Bending Element
Y-poled for Parallel Operation (3-wire)
series poled bender
parallel poled bender
2-Layer Extension Element
Y-poled for Series Operation (2-wire)
2-Layer Extension Element
X-poled for Parallel Operation (3-wire)
USAGE
Because of the possible confusion that can arise due to the combinations of poling, wiring, and operating modes, it helps to establish whether the element is going to be used as a bender or extender.
B - Bender
E - Extender

part number, part numbers