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. |
