Mechanical Dynamometer Detailed differences:
Low Capacity: 10,000 lbs and under
Medium Capacity: 15,000-20,000 lbs
High Capacity: 30,000 lbs and above |
Model
AP |
APxtreme |
Price and
Delivery |
Price Range
|
$617-$4045 |
$713-$4463 |
Typical Delivery
|
In stock to 3 days |
3 days to 2 weeks |
Factor
of Safety |
Minimum ultimate factor
of safety
|
varies from 3:1 to 5:1 depending on
capacity |
5:1 in all capacities |
Visual
Identifiers |
Dial
|
Traditional Dillon dial face |
Gray APxtreme label attached |
Serial Plates
|
"D" precedes the S/N |
"PL" precedes the S/N. All
S/N's above 500,000 |
Size
and Weight |
Low capacity headroom
loss / instrument weight
|
12.5" / 9 lb |
same |
Medium capacity headroom
loss / instrument weight
|
12.5" / 9 lb |
15.6" / 14 lb |
High capacity headroom
loss / instrument weight
|
29" / 64 lb (30-50K) 48" /
266 lb (100K) |
26" / 60 lb (30-50K), 34" /
165 lb (100K) |
Pressure
bar details |
Pressure bar ends
|
Square |
Rounded |
Material for 500, 1000,
2000 lb pressure bars
|
7075-T651 Aluminum |
Certified & Traceable E4340 Aircraft
Quality Steel |
Material for all other
capacities
|
E4340 Aircraft Quality Steel |
Certified & Traceable E4340 Aircraft
Quality Steel |
Pressure bar finish
|
Gray powdercoat paint |
Electroless nickle plating |
Bearings
|
Installed in pressure bar OR in shackles |
Installed in pressure bar only |
Shackles |
Shackle type
|
Anchor or closed-ball teardrop style |
Exclusively anchor shackles |
Shackle spacers required
|
No |
On medium and high capacities |
Non-destructive
examinations and Proof Loads |
Non-destructive examinations
|
Batch examinations using dye penetrant
or magnetic particle particle inspection (magnaflux) |
Every pressure bar is inspected using
magnetic particle inspection (magnaflux) |
Proof Loads
|
Not certified
Prood load prior to magnaflux. |
Each pressure bar is subjected to 150%
proof load prior to first calibration |
Carry
case / storage crate |
Carry case or crate in
all capacities
|
No, optional in 10" low and medium
capacities |
Yes |
Medium capacity case
|
Plastic case for 5", optinal steel
for 10" |
Wood crate for both 5" and 10" dials |
Certificates
included |
Calibration certificate
|
General card signed and dated by operator
(full curve of readings certificate is optional) |
Certificate showing 8-10 point curve
of readings based on 3 runs. Signed & dated |
Certificate of conformance
|
No |
Yes |
Options |
Klaxon alarm or auto
control switch options
|
No |
Yes |
Newton capacities
|
No |
Yes |
Frequently Asked Questions Why offer two models of mechanical
dynamometers?
As the leader in dynamometers, Dillon has been
asked by many large companies and government agencies to produce
custom versions of the model AP to comply with their stringent
requirements. Since many of the needs were similar, Dillon
found that they could solve most of the special requests with
a second product line, the APxtreme dynamometers.
Who are the typical APxtreme customers?
Dillon has sold enhanced versions of mechanical
dynamometers to the naval shipyards for nuclear refueling operations,
McDonald Douglas for assembly, GE for moving critical engines,
the navy for checking tension in aircraft landing drag cables
on aircraft carriers. They are suited for any customer that
wants every assurance of integrity that modern technology allows,
such as those in fright loading or heavy-duty material handling.
What are the actual differences
between the APxtreme and AP dynamomters?
- The medium capacity APxtremes are a different design than
the medium capacity AP dynamometers. They are longer, use
larger shacles and include a wood crate instead of a carrying
case
- The high capacity APxtremes are substantially shorter and
lighter than the equivalent capacity of APs
- The APxtreme pressure bar is a bit different from the AP.
It is optimized for the longest life, has rounded or chafered
ends and is electroless nicklel-plated. It is thicker and
heavier in the medium and high capacities
- Every APxtreme includes a certificate of conformance
- Newton capacities, the Klaxon alarm and control switch
options are available only on the APxtreme
Do the two instruments have the same calibration?
The APxtreme includes a detailed calibration certificate with
curve of readings based on three confirming runs. The AP will
be supplied standard with a card signed and dated by the operator.
A fully detailed certificate with curve of readins is available
at extra charge, either at time of order or after the sale.
Isn't the factor of safety a sufficient indicator
of safety worthiness?
The safety factor is the multiplier (times the instrument
capacity) that indicates how much additional load the dynamometer
can sustain without dropping the load. While this is a good
measure of design strength, there are other factors that are
equally important in load-supporting components. Design for
fatique, specification of aircraft quality materials, nondestructive
examination and proper corrosion protection are all essential
to safety.
Prudent companies will physically test their designs. Unfortunately,
not every company will verify that a component actually achieves
the factor of safety of the original engineering design. Dillon
has confirmed by destructive tests that
the factor of safety has been met in all its load-bearing components.
Also Dillon will only certify use of the material tested to
manufacture all dynamometers. Dillon will not test with one
material and manufacture with another.
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