This grinder uses linear motors on the grind axis, infinite position direct-drive grind turret, an automatic wheel changer, and user-friendly PC based controls for ease of use. The Tactic 40 Universal Grinder capability will be 40” (1000mm) long parts up to 300 lbs (135 kgs), and 9” (225mm) center height.
TACTIC 40
UNIVERSAL GRINDING
Universal grinding is for parts not suited for centerless grinders. For example, universal grinding is ideal for parts with shoulders, complex geometry, longer lengths, larger diameters, or parts in very low volumes. Universal grinders can also be used to grind the ID (interior diameter) and OD (outer diameter) of a part.
After years of success with our Tactic 8 Centerless Grinder we decided to apply our experience and design philosophy to building a new universal grinder. This grinder will have the same overhead linear motor drive movements along with built-in automation.
ABOUT THE TACTIC 40
The Tactic 40 Universal Grinder is a brand-new design of a universal grinder, using the latest technology.
Tactic 40 Machine Specifications
Grinding length range
1000mm (40”)
Center Height
225 mm (9”)
Floor space
2000 x 4000 mm (80 x 160” plus load/unload)
Total approximate weight
7500 kgs (16,500 lbs)
Wheel Dimensions
OD Grinding wheel
400 x 50mm (16 x 2”)
ID Grinding wheel
Full range of options
Speeds
OD Grinding wheel (standard)
40 m/sec (8000 SFM) (Max RPM 2000)
ID Grinding wheel
Full range of options
Power
OD Grinding wheel spindle
10.0 kw (14 HP) standard
Head Stock
4.0 kw (6 HP)
Slides
2-axis Turret Control
Cross roller rails driven by linear motor
Turret
Direct Drive with infinite angle capability
CNC and Servometers
CNC
Beckhoff machine controller, Yaskawa linear and rotary motors
Spindle bearings
Precision Angular Contact
ID Spindle
Full range of options
Lubrication and Cooling
Lubrication
Air purges on bearings with lubricated air
Coolant system
Coolant unit with tank, automatic paper filter and ¾ hp pump
AUTOMATED
Automated universal grinding with the Tactic 40 Universal Grinder includes a fully integrated flexible loading system, with a carousel-style magazine. The Tactic 40 has a programmable arm with various gripper options to load and unload the grinder.
HAND-LOADED
Our hand-loaded universal grinder has an automatic door option available to hand-load parts directly into the grinder, with programmable tailstock position for ease of part handling.
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The tolerances required in the manufacturing of aerospace products has become increasingly stringent within the last decade, progressing from .0001’s inch to sub micron levels (< .000040 inch).
The Tactic 8 Grinder, with the Keyence Optical Measurement System feedback has allowed us to make components well within those tolerances. It has facilitated elimination of inspection sorting of parts into classes by grinding to a specified Micron Class on demand, while holding tolerances easily within statistical process capability Cp/Pp of 1.33 – 1.67. Consequently, it has been possible to run the machine unattended, overnight, with lights out.
Alan Levesque
Grinding Engineering and Technology Development
RBC Bearings, Inc
Torrington, CT