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 |
Model APxtreme |
|
Price and Delivery |
List 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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