Should the following answers not give you all the information you need, feel free to click the "Live Chat" icon to the right to speak with a live service representative.
ORDERING AND ADDITIONAL INFORMATION
How do I order Invert-A-Bolt™ Products?
Ordering is easy! Call the customer support line at 877-467-BOLT (2658) or shop anytime using our online store. We accept cash, Visa, MasterCard, AMEX, and terms (purchase order with approved credit).
When can I expect to receive the product I ordered?
Many of the Invert-A-Bolt™ fasteners and insertion tools are stocked. For modular components and cutting tools the lead time is from 1 to 5 weeks depending upon the product. Common Modular fixtures are made to order and will take several weeks to ship. Once your products are shipped, you will receive a tracking number by e-mail. For more specific information regarding your order please call customer service toll free at 877-462-BOLT.
Who else uses these products?
Our market exposure is greatest in the Aerospace industry, but we have also made sales to the commercial OEM industry as well as the Semi-conductor industry. As our market exposure increases we expect to service manufactures of all types in many industries since our fasteners and modular fixtures can be applied to a multitude of manufacturing processes. Our customer list includes: Boeing, Bombardier, Cessna, GKN, Focus: Hope Manufacturing, Heroux-Devtek, Lockheed, Raytheon, Sikorsky Aircraft, United Space Alliance, Veeco, Warner-Robbins AFB, as well as many of their suppliers. In short,these products are suited for manufacturers in many diverse industries.
INSTALLATION AND RELATED INFORMATION
Why is it necessary to buy the insertion tool?
Due to the unique design of the Invert-A-Bolt™ outer housing, it would be rather difficult to install the housing completely without the insertion tool designed just for that purpose (flush mount application). The Invert-A-Bolt™ T-slot work supports do not require any special installation tools. The other products, however, do require installation tools. Mouse over any of the fastener pictures on the shop_fast.shtml page to see the specifications for that specific fastener, including the required insertion tool. Also, please refer to the applicable catalog page to determine the correct part number for the insertion tool.
What is the best way to create the hole to install Invert-A-Bolt™ fasteners?
What is the maximum torque I can use to tighten my Invert-A-Bolt™ product?
The torque wrench or pneumatic wrench should be set to a maximum torque of 35 ft-lbs. for the installation of the housing into the plate. Higher settings may result in damage to the insertion tool. Torque settings for pulling the stud into the mating material will vary based upon the IVB product being used. In general a setting of 30 ft-lbs. should be adequate. Higher settings may be used with the 1/2" & 5/8" diameter up to 45 ft-lbs. Excessive torque in soft metals may result in stripping of the threads in the receiving side hole. Click on the picture of the applicable fastener found on the shopping page to obtain exact information. We highly recommend the use of a torque limiting wrench to install the fasteners, as well as during use. Please see the accessories page for more information.
I'm having problems stripping the hex head of the stud. What am I doing wrong?
See above question about maximum torque values. Typically this problems occurs when a pneumatic wrench is used at a torque level set higher than the recommended level. To alleviate the problem, consider setting the torque level lower, use a rachet type wrench when engaging the product with the part, or use a ball-end hex wrench. Note, a refurbishment kit can be purchased to replace the internal components of the fastener, including the stripped stud.
I'm having trouble screwing the fastener into the plate. What can I do?
Double check the counter-boore size. It should correspond to the minor diameter of the outer thread of the housing. This hole size is critical to the successful installation of the fastener. Also insure that the hole has been prepared to the Installation and Operating Instructions.
The stud is vibrating loose when in use. What can I do?
Make sure that you are using enough torque when screwing in the stud. Recommended settings range from 30 ft-lbs. and up. Also, consider the material being machined and the fastener being used. Harder materials will require higher torques and the smaller stud fasteners won't be able to be torqued as high due to their hex size. Also, try using a Spiralock® tap which incorporates proprietary thread forms to improve resistance to vibration.
MAINTENANCE AND RELATED ISSUES
Is maintenance required for Invert-A-Bolt™ fasteners?
Maintenance is generally limited to replacement of the stud when damaged or the hex is stripped out. However, all the internal components of the fastener can be easily replaced either individually or with a refurbishment kit. To limit maintenance issues it is very important to use the plastic cap that is shipped with the fastener when the fastener is not in use. The cap is provided so as to prevent debris from entering the fastener when not in use. Also, to improve the life of the hex in the stud, use a ball-end hex wrench.
What happens if a product fails?
There is a full 90 day warranty on Invert-A-Bolt™ fasteners and insertion tools. The company will replace any defective part due to defects in the material or workmanship of the product. If the warranty period has expired, the product can be refurbished.
I'm having problems with metal chips getting into the housing. What can I do?
Typically this situation occurs in vertical machining when the Invert-A-Bolt™ fastener is in the "dis-engaged" position and is not being used. The flow of coolant and chips in this situation may result in accumulations inside the housing. This is a common hazard to vertical machining applications in which the Invert-A-Bolt™ fastener is not dedicated in its use. Your product is shipped with a cap that closes the hole in the top and it should be used when the IVB fastener is not in use. Some customes opt to plug most of the holes with a plastic plug, leaving only the fasteners in use to remain in the table. Please see the accessories page for more information on the available plugs.
What is the Refurbishment Kit?
Refurbishment kits consist of all the components that are internal to the fastener. Additionally, the covers and studs can be purchased individually if a complete refurbishment kit is unnecessary. We do not provide a replacement for the housing.
PERFORMANCE AND RELATED ISSUES
What about performance of inverted bolts to clamps? How do they save me money?
There are several factors which affect overall performance when considering a comparison between clamps and Invert-A-Bolt™ fasteners:
Typically a machine operator spends a great deal of time searching for
the right length bolts (for the heel and stud of the clamp) when
initially setting up a job run. (This is a common problem when a NC
program counter-bores a hole to a certain depth requiring a "right
length" bolt to accommodate the hole.) The machine operator may
actually cut bolts or modify the mill fixture if the right length bolts
cannot be located. This time can be multiplied if a double sided part
is being milled (and thus two sets of bolts are required). Often the
bolts are not kept with the mill fixture and thus, for every job run,
this process (and wasted time and effort) is repeated.
b) Various time and materials issues concerning the clamp as an obstruction
to the machining process. (NC Programmer - must program around the clamps
and find efficient machining sequences while considering clamp changes,
Machine operator - must move clamps during machining operations. Two
different sets of bolts may be required for the clamp changes when considering
double sided parts. The probability of hitting clamps and causing damage
to the part, endmill, and/or machine tool is high.)
c) Additional material required on the mill fixture to position clamps.
(Typically clamps are 2" to 4" long and the mill fixture is
increased in size to accommodate this stickout away from the part stock.)
d) If the part configuration requires bolting from the backside, no
special mill fixtures (bridge fixtures, double sub-plate fixtures, etc.)
The Invert-A-Bolt™ fastener is not necessarily ideal for every machining
application. Ideally, it can be applied to parts that can be "picture
framed" and tooling tabs can be used to hold the part during machining.
Some of the highlights of the product are:
a) The inverted bolt is maintained in a "housing" which is
secured in the mill fixture. The housing is threaded and thus allows
for easily replacing the Invert-A-Bolt™ assembly should it become
damaged. This also allows for the bolts to always be available at each
production run (or whenever it is used). There is no need for a machine
operator to find right size bolts.
The bolt contained in the Invert-A-Bolt™ assembly sticks up into the
part approximately .45" or less. Only the stud part of the bolt sticks
up into the part. This allows for a minimal obstruction surface of
Diameter X .45" for each Invert-A-Bolt™ Fastener. This provides a much
smaller obstruction during the machining process and requires no
changes. (In fact, the stud can also be recessed completely during the
process which could allow for the tooling tab to be milled completely
off during the machining process.)
c) No additional stock is required on the mill fixture outside the
part stock limits.
d) Because only the stud sticks up into the part (the "footprint"
of the IVB fastener is the diameter of the stud), part stock requirements
can be reduced.
e) All machining operations required to make the mill fixture (holding
the Invert-A-Bolt™ fasteners) are performed from one side. There
is no requirement to flip the mill fixture over to prepare or install
the Invert-A-Bolt™ products. This means all preparation is from
the front side of the mill fixture.
g) By using Invert-A-Bolt™ products, the need for helical inserts
in an aluminum mill fixture is eliminated.
h) Invert-A-Bolt™ products are being used in production environments
at many manufacturers across the United States. The products are well
received and being used successfully in many part/mill fixture applications/configurations.
I'm having problems bringing the stud up into the part. What can I do?
Be certain that the chamfer on the "receiving" side is being
machined. Either add the chamfer (if left out) or increase its size to
enhance the ability of the stud to align itself with the receiving hole,
thus alleviating the problem. See the installation
and operating instructions page for additional information.
I'm having problems with studs sticking up above the housing. What can I do?
(This question applies to AA02-001-001 fasteners and work supports only).
First, insure that the stud has been properly screwed down into the
housing. If it continues to "pop up" then the drive ring has failed and
requires replacement. This is a result of wear on the drive ring. A refurbishment
kit can be purchased to replace the drive ring.
Why Universal Fixturing?
For many milling applications and manufacturing solutions, using universal fixturing is a very efficient use of resources and an excellent holding solution for many manufactured parts.
Here are some of the advantages for using universal fixturing as opposed to conventional fixturing: Reduce overall tooling costs by:
Eliminate dedicated fixturing and creating a "standard"
Eliminate tool design and tool build for dedicated mill-fixtures.
The tool once in service is used perpetually for all applicable part configurations. This has several advantages:
The tool is not stored "somewhere out there", its
always in use and doesn't require additional storage area(s) to be
utilized. (Not to mention, identification, indexing, and other inventory
Eliminate maintenancing of dedicated mill-fixtures.
Eliminate perpetual capital investment in dedicated fixturing.
The cost of the tool can be spread over many parts to reduce
"one-time" tooling expense.
Eliminate load and unload time for dedicated mill fixtures.
Provides the unique benefits of Invert-A-Bolt™ products.
Provides use of other modular fixturing components together with
Since Invert-A-Bolt™ products are designed to allow for
tolerance variations, the cost of the Invert-A-Bolt™ Universal
Fixture is lower than other commercially available products because
precision locating requirements are reduced.
STRENGTH, MATERIALS, AND RELATED ISSUES
What materials and hardness are the Invert-A-Bolt™ products made from?
This information is included in the applicable catalog pages. See also the following FAQ.
Have the products had any failure tests performed?
Yes. Failure testing has been performed on the AA02-001-001, AA02-010-001, and AA03-010-001 fasteners. Following is an excerpt from the AA03-010-001 test report:
"Six fasteners of the above part number were received for tensile
and shear testing (three each). Due to the specialized nature of the
fastener, it was necessary to produce a unique test fixture to allow
for proper testing. The test fixture was designed such that the same
fixture could be used to perform both the tensile and shear test.
The test results for both tensile and shear testing follow. In all
cases the tensile failures occurred in the hex recess area of the 1/2-13
threaded end as would be expected. the shear failures occurred partially
in the hex recess area. Of special note - the shear failures were not
typical of shear failures in standard fasteners. Instead of the normal
abrupt shearing action, these fasteners deform and slowly tear. For
purposes of this report, shear failure was defined as the initial point
of macro deformation."
AA03-010-001 Tensile Test
Dia. or Gauge
Red. of Area (%)
* The psi (stress) is calculated from the thread stress
area (.1419); however, this number is not accurate because it is based
on a solid cross-section and this part has a hex recess which subtracts
from the cross-sectional area.
** The third test result was not valid because the 1/2"-13 screw
was not properly engaged into the test fixture.
A03-010-001 Single Shear Test
Following is the test data for the AA02-001-001 (1"
dia. housing x .801" length, 1/2"-13 Stud) product:
AA02-001-001 Tensile Test
AA02-001-001 Shear Test
Dia. or Gauge
Dia. or Gauge
*Note: All failures occurred at the housing.
Following is the test data for the AA02-010-001 (1"
dia. housing x 1.150" length, 1/2"-13 Stud) product:
AA02-010-001 Tensile Test
AA02-010-001 Shear Test
Dia. or Gauge
Dia. or Gauge
*Note: Housing was backed off from screw.
Should I use a locking solution to ensure the housing doesn't move due to vibrations, etc?
Using a locking solution (like Loctite®) to secure the Invert-A-Bolt™
housing is not recommended. This practice defeats the unique characteristic
of the Invert-A-Bolt™ product to be easily maintenanced from the
top of the fixture or completely replaced, if need be. Most of the fasteners are
designed with a left hand thread so that movement will be away from the
What can I do to improve performance of my Precision Locator?
Be certain to re-apply anti-seize compound to the locating portion of the stud as required. In addition, consider leaving the stud in the "up" position prior to loading. This allows helps "finding" the hole with the stud. Also, bring up the Precision Locator stud FIRST, prior to the other fasteners.
ELIJAH TOOLING, INC.
Invert-A-Bolt™ Products U.S.A. Made, Quality Tooling Products