tooth geometries for
a nearly unlimited number of saws are stored on the hard drive of the
built in Intel® Celeronä
computer. Each saw is sharpened exactly the same way every time. Set
ups are very fast; it takes just seconds to begin sharpening the next
The full color
touchscreen shows the operator a picture of the tooth to be ground. Icon-based
graphics make the machine easy to set-up and run, even for non-readers.
The Armstrong Topper
uses three CNC axes and a hydraulic feed axis for speed, versatility
and accuracy. It grinds the tops
of saws from 6” (150 mm) to 28” (700 mm) diameters. Tooth spaces
up to 3” can be sharpened. Options include a full enclosure, either
water-based or oil coolant and a built-in de-mister for use with the
enclosed model grinder. This machine can be
ordered as a dual function machine (STF-628) that both tops and
faces your saws.
2135 NW 21st Ave. Portland, OR 97209 USA
(503) 228-8381 Fax: (503) 228-8384
Copyright Armstrong Mfg Co. 2002
STC-628 Topper Only
- Saw Diameter: 6" to
28" (150 to 700 mm)
- Saw Eye Diameter: 1/2" to
9-5/8" (12 to 230 mm)
- Tooth Space:
1/4" to 3" (6 to 76 mm)
- Back Angle Range: 5 to 20 degrees
- Top Bevel Angle Range: up to 45
- Grinding Wheel Diameter: 6"
- Grinding Wheel Speed: 5400 SFPM
- Grinding Motor Rating: 1.5 HP (1 kW)
- Air Requirements: 80 PSI
- Size: 54” wide x 48” deep x 81”
high (1375 x 1220 x 2050 mm) for the enclosed model
- Final specifications may vary
slightly to reflect latest design enhancements
STF-628 Topper &
- Top grinds 6" to 24" (150
- Face Grinds 6" to 28" (150
- Face Grinds hook angles from 45 to
-20 on saws up to 24" (600mm). Available option: hook angles from
45 to +20 on saws up to 28" (700mm).
- Face bevels up to 15
- All other specs same as STC-628 Topper
The computer calculates all offsets for beveled and triple chip
saws, so the faceplate never needs to be manually adjusted.
Operator can select to automatically reverse the rotation of
the cup wheel to always grind onto the carbide or choose non-reversing
operation for faster cycle times.
coolant or water-based coolant: your choice.
The Armstrong CNC Top grinder can be supplied either way.
Fire suppression is available from Armstrong or we will help
you work with your local supplier.
Whether you choose oil or water, two nozzles direct the coolant
between the grinding wheel and the carbide tip.
All adjustments are made through a
touch screen control panel that displays a picture of the finished
tooth shape. A built-in memory recalls the settings for a
virtually unlimited number of saw configurations.
- Intel® Celeronä
PC control for speed and reliability
- 3 axis brushless servo system
for long life and precision control
- Full color Touch screen for
- Thousands of customized tooth
shapes can be stored for fast set-ups and consistent grinding
- Specialty saws with up to 40
teeth in a segment can be sharpened
- Total control of stock
removal, tooth configuration, wheel lift off, and grinding depth and
- Available either totally
enclosed or open: your choice.
- Water-based or oil coolant
available: your choice
- No need to adjust for saw
thickness. The machine calculates all offsets from the plate
thickness and kerf values entered by the operator
- Grinding wheel motor
automatically reverses direction for right and left-hand teeth
- Multiple pass per tooth
- Optional mist removal system and
coolant filtration systems are available at extra cost
- STF-628 dual function model both
tops (to 24" diameter) and faces (to 28" diameter) dependant
on hook angle
finger” retracts as needed for any tooth space within the capacity
of the machine, including variable pitch saws.
Saw loading and set-up times are very quick.
The saw has been removed to show the feed finger, faceplate, cup
wheel, saw mandrel and clamp mechanism.