Services for Plastics, Inc. is the
North American full-service distributor of Baty Bore Gauges.
The 20+ year alliance between our firms gives you the best possible
product and services for your bore measuring needs.
Baty bore gauges are an indicator type
gauge used to measure the dimensional variation inside an injection molding
or an extruder barrel. However,
they may be used wherever there is an inner diameter that has to be reached
HOW DOES A BORE GAUGE WORK?
All models work on the proven principle of
two diametrically opposed measuring points, one fixed and one moving, plus a
spring-loaded centralizing shoe. Don’t
waste your time and money on other inferior brands that do not use this
WHAT A BORE GAUGE WILL CHECK?
Dial bore gauges allow rapid and accurate
checking of bores for: size,
ovality, taper and wear within a deep bore.
WHEN TO USE
At any time your equipment is shut down
and you want to check barrel for wear.
It is recommended to use on a routine maintenance program that
provides you with consistent recordings for knowing when barrel wear occurs
and when it is time to consider replacing barrel.
Note: To obtain correct bore measurements,
the barrel must be clean of all plastic debris and be cool to ambient
temperature. Barrels measured
at elevated processing temperatures must factor in Linear Coefficient of
Thermal Expansion (LCTE) variables.
PREVENTATIVE AND PREDICTIVE MAINTENANCE
Instrumental to any predictive and
preventative maintenance programs is the use of a bore gauge for barrel bore
measurements. Most plastic
processing companies have specified within their ISO-9000 or QS-9000 Quality
Systems that periodic inspection of barrel bores is required.
By periodically taking wear measurements
down the length of the barrel bore, a pattern of wear can be determined. Once the data is recorded, an overall pattern of Mean Time to
Failure (MTF) can be projected. This
course of action will allow plastics molders to plan and schedule
maintenance downtime on a machine before the machine is unable to make
For more information regarding how to
establish a Preventative or Predictive barrel measurement program, please
contact us at 1-800-627-1033.
WHY CHOOSE A SERVICES FOR PLASTICS,
INC. BORE GAUGE?
Easier and convenient to use, in a word
Simplicity. Some bore
gauges can be time consuming to setup and to use.
The Baty gauge has been specifically designed for ease of use.
Typical setup time to measure a barrel bore is less than 5 minutes.
Inspection time to fully measure a cylinder and record the data is
less than an hour regardless of barrel size.
And disassembly and storage of the gauge will happen in less than 5
minutes. In just over an hour
per machine you will collect and be able to analyze data on the barrels wear
patterns that will determine your repair or replacement options.
BATY BORE GAUGE WITH DIAL INDICATOR
Baty Dial indicators are recognized
throughout the world as quality measuring instruments. Measuring equipment,
like a production plant, must be continually improved to keep abreast of
lost profits due to worn barrels
scrap and increase machine run time
and easy to operate
at your convenience
Bore size to be
accurately read from the instrument with the minimum of effort. The fixed
end of the anvil piece has pressure fingers on either side of it that assist
correct placement in the bore; this reduces the reliance on feel by the user
SPECIFICATIONS AND FEATURES
--meets or exceeds all international standards
Sensitivity--obtained by accurately machined and highly finished, low
friction forms and surfaces
toughened materials for spindle and pinions enhances life and shock
movements for rigidity and ease of maintenance
interchangeable parts and unit construction for economical servicing
highly burnished pivots and bearing surfaces to equal jeweled bearings
quality materials used throughout
electric or air hookup needed
graduation indicator readings
centralizer shoe for easy repetitive performance
protected movements with revolution counter
bores, a range of interchangeable extension rods allows a single instrument
to measure a wide range of bore sizes
BORE MEASURING TECHNIQUES THAT FAIL
Telescopic Gauges: How they are used
There are a range of gauges that are used
to measure a bore's size, by transferring the internal dimension to a remote
measuring tool. They are a direct equivalent of inside calipers and require
the user to develop the correct feel to obtain repeatable results. The
gauges are locked by twisting the knurled end of the handles, this action is
performed to exert a small amount of friction on the telescopic portions of
the gauge. Once gently locked to a size slightly larger than the bore, the
gauges are inserted at an angle to the bore and slowly brought to align
themselves radially, across the hole. This action compresses the two anvils
where they remain locked at the bores dimension after being withdrawn. The
gauge is then removed and measured with the aid of a micrometer or Vernier
Small Hole Gauges: How they are used
They require a slightly different
technique, the small hole gauge is initially set smaller than the bore to be
measured. It is then inserted into the bore and adjusted by rotating the
knurled knob at the base, until light pressure is felt when the gauge is
slightly moved in the bore. Measurement is again by external means.
Both Telescopic and Small Hole gauges fail
to meet the needs of proper bore measuring because they are difficult to
obtain accurate and repeatable measurements and they do not allow for full
bore length measuring. They are
only capable of measuring one spot at a time and cannot show the user if
there exists pattern wear that only a continuous measurement can display.
BATY BORE GAUGE SUPPLIED COMPLETE
A Baty bore gauge is supplied complete for
comparative measurements of bores falling within its specified capacity,
typically 7/8” (22mm) to 6” (153mm). Gauges for measuring even larger
bore diameters are available.
Absolute measurements of bore size are
possible by setting the bore gauge to size, using a bore of known diameter
or measuring the distance between the fixed point and the moving point using
a calibrated micrometer. An easy to read dial indicator is mounted at the
remote end to measure the axial movement of the measuring head. There is a
range of interchangeable anvil pieces (extension rods) that transfer the
measuring movement to the dial indicator displaying bore deviation.
TYPICAL EASE OF OPERATION
Adjust the extension rod as necessary so
that the gauge will enter the bore and the dial indicator registers. The two
contact points on the spring-loaded shoe "A" and the fixed-point
"B" form a 3-point contact which centralizes the gauge in the
bore. There is no need to grip the gauge firmly and no attempt should be
made to influence its position across the bore, as it will centralize itself
in this position.
If the gauge is rocked very slightly
backwards and forwards so the points "B" and "C" cross
the diameter of the bore, it will be seen that the indicator hand moves to a
minimum reading and then returns. This minimum reading indicates the
position at which measuring points "B" and "C" are
correctly on the diameter of the bore, and all measurement readings are
taken from it.
SETTING THE BORE GAUGE FOR PLUS AND MINUS
If plus and minus readings are required,
adjust the extension until the "minimum" reading occurs, roughly
midway in the range of the dial indicator.
Should the full plunger travel be required in one direction, adjust
the extension until the indicator registers just at the beginning or end of
its travel according to the direction required.
Lock the extension securely with the nut.
The indicator with its shroud can be adjusted on the body of the
gauge if socket-head clamp screw "H" is loosened. Using this
adjustment and the rotatable bezel of the indicator, the hands and main dial
can be positioned wherever required within the range of movement.
To inspect a bore merely for
out-of-roundness, taper and other variations of shape, or wear, without
using a master, set the indicator to zero at one position in the bore and
then take readings at other positions.
CHECKING VARIATION TO A KNOWN SIZE
The gauge can be set in a bore of known
diameter, preferably a ring gauge of the size to be checked. With care, the
gauge can be set by outside micrometers or by slip gauges in a holder.
Remember that unlike a bore, micrometers and slip gauges have flat faces,
and the setting must therefore be square to these faces.
BORE GAUGE MAINTENANCE
Baty bore gauges are manufactured for
continuous use, but must still be treated as a fragile quality measuring
device. Standard maintenance of
the gauge should be performed every 3 months or 1,000 bore measurements. Please do not attempt to disassemble your bore gauge.
For repair, maintenance and calibration services, contact Services
for Plastics, Inc. at 1-800-627-1033.
The following routine maintenance is
suggested every 3 months:
Check the extent
of flats on shoe contacts
Clean, polish or
turn the balls, whichever is applicable, or replace
angular play between shoe and bottom section, replace the shoe
crank for wear or damage on edge of ground face and replace if necessary
Examine the top
plunger for wear and/or damage
Clean and oil all
Please do not attempt to disassemble your
bore gauge. If a component on
your bore gauge wears or breaks, SFP has replacement parts to service
and repair. While some
components on the gauge are non-serviceable, all components can be replaced
at a considerable cost savings over purchasing a new gauge.
For information regarding pricing and availability of repair
components and service, call SFP at 1-800-627-1033.
As per most ISO-9000 or QS-9000 Quality
Systems, yearly inspection and calibration of all measuring equipment is
necessary. When the time for
this inspection occurs, contact SFP at
1-800-627-1033 for quotation of inspection and calibration.
Your bore gauge was shipped in a special
impact resistant wooden case. This
is where bore gauge should be kept when not in use.
This gauge does not require special environmental storage. Any clean, ambient temperature environment will be
satisfactory. Do not the store
the gauge where it can come into contact with large amounts of dust or
USEFUL LIFE SPAN
The Baty precision bore gauge is designed
for continuous and repeatable use. With
proper care and maintenance of the gauge, it has a useful life that can
exceed 10 years.
here for more information on Bore Gauges