Burri BZ70H CNC Generative, Profile & Worm Gear Grinding Machine
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The Burri Model BZ 70 H gear grinding machine is the latest innovation from Burri with a remarkable portfolio of firsts. Horizontally oriented, this clean-sheet design is targeted towards small diameter planetary and sun gears through utilization of a very small mini grinding worm.
This design allows very fine adjustment of the tailstock center and incorporates two synchronous workpiece spindles to eliminate unstable rotating tailstock centers - guaranteeing more effective and concentric workholding during the grinding process.
The BZ 70 H is the first non-hydraulic gear grinding machine - the most energy efficient design on the market as well. Goodbye to hydraulic pump noise!
Capable of grinding solid (green) workpieces, this machine can solve real-world problems with hardened gears in automotive, aerospace, power transmission and the medical manufacturing sectors. Featuring Generating, Profile/Form or Worm Grinding capability, this machine will be outstanding for the fine pitch work in your facility!
It can be configured with or without a loading system and is built to order.
Rebuilding & improving existing generating grinding machines is in Burri's DNA since 2002. Along the way, NEW machines were developed (such as the BZ 70 H!) along with rebuilds. Now there are more than 100 Burri machines sold and in operation throughout the world. Even mother machine builders use Burri for the more 'difficult' applications...
BZ 70 H Generating, Profile & Worm Grinding Machine.
Hydraulic free, horizontal gear- and worm grinding machine designed for corundum or CBN grinding wheels. The two synchronous driven workpiece spindles allow extremely precise workpiece handling between the centers. Due to this special design, the machine is well suited for the economic processing of very small gears, pinions, shafts and worms.
BZ 70 H GENERAL SPECIFICATIONS METRIC INCH
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Workpiece Diameter Minimum 00.00 mm 0.0000" (In Theory)
Workpiece Diameter Maximum 70.00 mm 2.7559"
Module Minimum 00.30 mm 84.6667 DP
Module Maximum 2.00 Mod 12.7000 DP
It is possible to grind into solid, especially for even smaller Modules.
Helix Angle ±45 degrees bis + 135 Degrees
Workpiece Overall Length 150 mm 5.9055 Inch (From Table to Tailstock)
Clamping Length 370 mm 14.5669 Inch (From Table to Tailstock)
Workpiece Weight Maximum 2.0 kg 4.41 Lbs.
Workpiece Speed Maximum 4000 RPM
Grinding Pass Length 150 mm 5.9055"
Grinding wheel speed 80 m/sec 262.4672 ft/min
Grinding Wheel Max Diameters:
Generating Grinding: 120 mm 4.7244"
Worm Grinding: 280 mm 11.0236"
Grinding Wheel Max Width 120 mm 4.7244"
Dressing Disc Diameter Minimum 120 mm 4.7244"
Dressing Disc Diameter Maximum 140 mm 5.5118"
Machine Color (Standard): RAL 9010 'Pure White'
Compressed Air Quality: ISO 8573-1:2010 Class (7:4.4).
• B&R Controls and Servos with Hybrid Systems - Motor & Encoder in one cable.
• B&R-'Acopos'-Multi controller with power regeneration.
• B&R operating panel with 21.5“ touch screen-monitor (the monitor is split in two sections).
- Section one is for the machine operation.
- In section two the operator can choose the content. He can select between automation, balancing and touch control or the Burri filtration unit.
• Dittel balancing system with integrated acoustic touch control.
• Continuous Shifting during Grinding Process.
• Profile & Lead Modifications.
• Remote Diagnostics.
• Conversational Programming.
• Manual or Gantry Load - See Optional Equipment listed Herein.
• Optional Part Stocking Magazine - See Optional Equipment listed Herein.
• Festo pneumatic components.
• Machine signal lamp (red/yellow/green) integrated in machine cover.
• B-, C- and profiling axis are water-cooled integrated spindles.
• Non-hydraulic machine (best power efficiency of all gear machines in the market).
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