| Standard and custom software for spur and
helical gears -- software for gear geometry,
gear calculations, active-mesh graphics, change gear finding, gear grinding, gear hobbing,
and gear inspection. Also software for non-involute forms, non-circular gearing, and
!!!!! ALL SOFTWARE AT THIS SITE IS BEING UPDATED TO RUN ON 64-BIT MACHINES !!!!!
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Standard Software -- Click on any of these program names for a description:
| GEARPACK - Calculations, form geometry, DXF files & graphics
-- mating gears or single gears.
HOBIT - Hobbing machine setup including a fast, accurate change gear finder.
CONFORMS - Generation of mating forms -- involute, non-involute, parallel or crossed axes.
FLUTES - Wheel profiles for grinding helical gears or threads or drill flutes.
INVFORMS - Define a gear tooth for grinding-- involute modifications, root and tip geometry.
KAYCHART - Involute chart from CMM data for a gear tooth or a plated wheel, spur or helical
FEATURES - Back engineer a gear from CMM data or hob data.
FITFORMS - Curve fitting, shifting, rotating, plane shifting, mirroring, form offset, etc.
Graphics & other auxiliary programs
Price list & how to order
This software runs under Windows-- 95, 98, Me, 2000, NT, XP,Vista, 7(32-bit or 64-bit in XP mode)
Design single gears or mating gear pairs -- or verify gear print
information -- or use it to convert
gear print information into manufacturing and inspection information -- or look at the active mesh
of mating gears -- or get a DXF file of a gear form for your CAD system.
Flexible input and on-screen 'help' pages greatly simplify data entry.
You enter the data
you know -- GEARPACK calculates all the missing data. For example, find the specs for
replacement gears in old, worn, or damaged machines when only the gear center distance
and number of teeth are known.
The menu-driven options are very easy to use -- by gear designers or shop personnel.
* GEARPACK performs all these calculations (including interference & limit checks):
- Tooth thickness from overpin measure or overpin measure from tooth
- Tooth thickness from span measure or span measure from tooth thickness.
- Tooth thickness from test radius or test radius from tooth thickness.
- NDP (normal diametral pitch) from pitch diameter or pitch diameter from NDP.
- NPA (normal pressure angle) from base diameter or base diameter from NPA.
- Helix angle from lead or lead from helix angle.
- Roll angle, roll length, tooth thickness, pressure angle, base pitch, and other involute
information at specified diameters.
- Hob approach and overtravel distance and much other hobbing data including
generating length and depth factor to achieve a given tooth thickness.
* For mating gears, GEARPACK calculates (in addition to the graphics
- Contact ratio, SAP (start of active profile) diameter, and SAP roll angle.
- Tooth thickness based on maximum and minimum backlash.
- Minimum workable NDP (for maximum strength).
- Based on NDP input, finds center distance from helix angle or helix angle from center distance.
- Long/short addendums based on X-factor inputs.
- Outside diameter, root diameter, gear lead, helix angle, and all other specs.
* GEARPACK also calculates gear form data and presents a graphics screen
single gears or mating gears in mesh -- including rotation of the mesh. Mesh graphics is not
simple animation--it is totally accurate at any magnification.
* Full graphics capability -- zoom, pan, measure, overlay, etc.
* Quickly and easily transfer the gear tooth form to a CAD system with DXF
file transfer so you
can use the tooth -- or the whole gear -- in your assembly and detail drawings. You can also
use the output directly for wire EDM or laser gear cutting.
* Transfer the gear or gear tooth in HPGL format to a plotter or printer--
make hard copy of
the form or tranparencies for optical inspection.
* GEARPACK works for both external and internal involute gears and worms on
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HOBIT also includes a fast, accurate change gear finder which works
directly to find change gears
for any given ratio. -- super fast and always the best solution.
Setting up your whole operation -- machines and gear tables -- is so
easy that we offer to
prepare your initial tables for you free of charge. You can completely define your sets of change
gears--missing gears, extra gears, etc., and HOBIT will make the setup even if your feed gears and
index gears must share the same set.
This is not the old 'pick and try' software you may have already
tried, but the very best solution--
and guaranteed to fit the gearbox space without 'juggling gears' or recalculating over and over.
HOBIT allows compounding of up to eight gears in a gearbox--unheard of accuracy to achieve
any gear ratio required. There is even an option to keep the feed gears the same for both left
and right hand work to simplify switchover when hobbing gear pairs that differ only in hand.
HOBIT can make your old hobbers competitive with CNC hobbers by
reducing setup time and
providing totally accurate setups -- Barber-Colman, Gould & Eberhardt, Cleveland, Pfauter, any
machine (even including continuous shift and oblique feed hobbers).
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CONFORMS takes the known tooth form of a gear, rack, or worm, and
generated form of the mating gear, rack, or worm. Tooth forms may be helical, spur,
involute or non-involute, external or internal. (Examples: gear teeth, including root generation
and involute modifications; worms; splines; ratchets; sprockets; impeller rotors; hobs;
shaper cutters; seaming & rolling dies)
Mating parts may mesh at parallel or crossed axes. The input form may
be given in any cutting
plane and the output form can be provided for any cutting plane. Form geometry for input and
output is lines and arcs (if your geometry is supplied in terms of a math function or rectangular
or polar coordinates, FITFORMS can convert it to line-arc geometry). Tooth form geometry
may also be imported from a CAD system, created by our GEARPACK, INVFORMS,
RAKFORMS, or FLUTES software, or calculated 'longhand'.
The output geometry is mathematically exact, not
approximate. Output may be graphically
displayed (including active mesh), transmitted to a CAD system, or used as input to other
programs. You can use the output directly for wire EDM form cutting or other N-C
operations. Output geometry can be in our own SES format, DXF format, HPGL format,
or generic N-C format (G1, G2, G3 codes, etc)
You don't need to be an expert--use the built-in sample jobs and
help screens to
- You can design your own hob or shaper cutter to generate any form--splines,
Common problems with generated forms are 'fill-in' and 'undercut' because the hob design
doesn't exactly produce the form you want. A standard option with CONFORMS is the
ability to 'play back' a generated form to get a direct comparison between the input form that
you want and the generated form you will get. You can specify the hob specs to the vendor
and know exactly what to expect in the finished part. You can also ensure that hobs from
different vendors will be the same.
- You can find the difference in the form cut by a new hob or shaper cutter
and a form cut by a
sharpened-back hob or shaper cutter. This is very important for non-involute forms or involute
- For semi-topping or preshave operations involving protuberance, you can
find the difference
in form when you use a hob or shaper cutter designed for one number of gear teeth to cut a
different number of teeth.
- You can optimize the design and mesh of impeller rotors, rolling dies, and seaming dies.
CONFORMS is available as stand-alone software, but is more commonly used as
part of a
development system which includes the INVFORMS, GEARPACK, RAKFORMS,
FITFORMS, SCREENIT, and DXFILES software described elsewhere on these pages.
A full-function browser is included free of charge.
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FLUTES takes any helical form specified in any cutting plane--
transverse, axial, or normal and
calculates the axial form of the grinding wheel or milling cutter which will produce the given form.
Helical gear teeth, worms, drill & tap flutes, and thread milling are possible applications.
FLUTES also does the reverse operation by taking as input the axial
form of a grinding wheel or
milling cutter and calculating the resulting helical form in the transverse, axial, or normal plane.
This reverse operation also works as an automatic 'playback' option every time you run a job to
guarantee that what-you-see is what-you-get.
FLUTES works with both internal and external parts. Form
geometry for input and output is
lines and arcs (if your geometry is supplied in terms of a math function or rectangular or polar
coordinates, FITFORMS can convert it to line-arc geometry). Form geometry may also be
imported from a CAD system, created by our GEARPACK, INVFORMS, or CONFORMS
software, or calculated 'longhand'.
Output may be sent to a CAD system, linked to other software, or used
for graphic display
on a screen or plotter. This geometry is mathematically exact, not approximate. Output
geometry can be in our own SES format, DXF format, HPGL format, or generic
N-C format (G1, G2, G3 codes, etc).
The changing diameter of a formed grinding wheel after successive
truings is often a critical
factor because the wheel form is always calculated for a particular diameter. Use FLUTES
to determine the range through which a wheel diameter can change and still produce an
accurate helical part.
- You can design grinding wheel shapes for full form helical gear grinding.
- You can find the difference when you use a plated Borazon grinding wheel
(or any pre-designed
hard wheel) designed for a certain number of teeth and a certain helix angle to grind a different
- For deep forms or high helix angles, you can determine the root fill-in
which always makes the
difference between the form you ask for and the form you get.
- You can design grinding wheels for external or internal thread forms--even
when the wheel setting
angle is not the same as the thread angle.
FLUTES is compatible with CAD systems using DXF file transfers. FLUTES
is available as
stand-alone software, but is more commonly used as part of a development system which
includes the INVFORMS, FITFORMS,SCREENIT, and DXFILES software described in
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Involute modifications can be made at multiple points along the
tooth flank. Modifications
can be ordinary 'K-chart' style or 'barrel-curve' style.
Tip modification can be a full radius, a 'sweep-out' radius, or
a chamfer. Root fillet can be a
given radius or a self-calculated full fillet.
Output can be a single tooth or space, multiple teeth, or the
whole gear. INVFORMS makes
a graphic overlay (using SCREENIT) which allows direct comparison between the modified
and unmodified tooth. Geometry output can be sent to a CAD system using a DXF file or it
may be used directly by CONFORMS or FLUTES.
This software is menu-driven and extremely simple to use. It
includes on-line help screens
which explain each input--also a GEARHELP section for gear geometry calculations.
INVFORMS also applies to involute splines. back to top
This program will draw an involute inspection chart using either
the gear tooth inspection data
or the inspection data for the plated grinding wheel which grinds the gear. It works for
spur and helical gears, external or internal. Output is shown on-screen, and can be
transferred to a plotter or printer using HPGL or DXF format.
Most modern Coordinate Measuring Machines have the ability to produce
an X-Y file of
data points. Kaychart can read this file (in any format) directly which greatly simplifies the job.
Kaychart's output is mathematically exact, not approximate, even when the plated wheel is
used to grind a helical gear.
Kaychart is especially useful to check the errors a plated wheel will
produce when it is used to
grind a gear for which it was not designed.
The Kaychart software includes Features, Screenit, Plotit, &
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With no other data except CMM inspection points, FEATURES calculates
the base circle
diameter, TIF diameter, undercut diameter and amount of undercut, chamfer diameter, root
diameter, outside diameter, normal base pitch, and tooth thickness. It also calculates the roll angle
at each of these diameters and displays the form on the screen. In conjunction with KAYCHART,
these same inspection points can be used to produce a standard involute chart showing involute
To reverse engineer the gear from a known hob (which may be a short
pitched hob or a
protuberance hob), it is necessary to define the hob using RAKFORMS which then
automatically runs FEATURES.
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For curve fitting, you specify the 'fit tolerance' which is the
maximum allowable difference
between any input point and the output line-arc curve.
A helical plane shift allows you to transfer a geometric form which is
defined in one cutting plane
to any other cutting plane--axial to normal, transverse to normal, normal to axial, etc. This is a
true geometric conversion, not an approximation.
Fitforms can also combine two or more geometry files and sort the
elements to make
a continuous form. It can also work interactively with SCREENIT, the screen
Geometry files can be imported / exported as DXF files
from a CAD system.
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This software runs under Windows-- 95, 98, Me, 2000, NT, XP, VISTA,7
- Give us a company purchase order and let us bill you.
- Prepay with a check or money order. (This gets you a 5 per cent discount.)
Illinois residents add 6.75 per cent sales tax.
Orders from outside the US must be accompanied by payment. Bank transfer data
will be provided if necessary.
Software (on CD unless otherwise specified) and printed manuals
will be shipped
SOFTWARE ENGINEERING SERVICE
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