Bryant Grinder

Specifications
Max. Swing - Diameter	88"	223mm
Max. Swing - Diameter Over Table	42"	1067mm
Maximum Length of Bore	1524mm	60"
Maximum Bore Diameter	1525mm	60"
Maximum Included Angle Taper - Manual	70°
Max. X-Axis Stroke	711mm	28"
Max. Z-Axis Stroke Standard	914mm	36"
Max. Z-Axis Stroke Optional	1219mm	48"
Max. Z-Axis Stroke Optional	1524mm	60"
Max. Z-Axis Stroke Optional	1829mm	72"
Max. Z-Axis Stroke Optional	2134mm	84"
X-Axis Resolution Standard	0.00025mm	0.00001"
Z-Axis Resolution - Standard	0.00025mm	0.00001"
Variable Feedrates - X-Axis - Zero to	15 m/m	600 IPM
Variable Feedrates - Z-Axis - Zero to	9 m/m	360 IPM
Maximum Workhead Speed	255 RPM
Work Drive Motors - Shoe Centerless	7.5 kW	10 HP
Maximum Spindle Speed - Belt	10,000 RPM
Maximum Spindle Speed - High Frequency	18,000 RPM
Wheel Drive Motors - Standard	18.6 kW	25HP
Maximum Spindle Speed - Optional	22.4 kW	30 HP
Approximate Net Weight	16,325 kg	36,000 lb

The Model LL4 is the largest machine in the Bryant Lectraline series of precision, CNC grinders.

Maximum stroke of 84" (2134mm), and the capability of swinging parts up to 88" (2235mm) OD.
Multifunctional machine grinds practically any type of workpart configuration, including straight and tapered bores, OD's faces, backfaces, and complex forms.
Many surfaces can be simultaneously, sequentially, or vector ground in a single chucking, thereby saving time and insuring concentricity and squareness.

Features

Optional Features

Easy Operation
•	Minimizes Operator Training
Simple Modular Design
•	Standardized Tooling and Major Machine Components
Multi-Directional / Vector Grinding
•	Grind in any direction
Self-Diagnostics
•	Minimal Downtime
Fine Resolution
•	0.00001" (0.00025mm) Standard
Productivity
•	Fast Cycles and Less Idle Time
Energy Efficiency
•	Uses Power Only on Demand
Less Downtime
•	Quick Set-up and Changeover
Versatility
•	High Production or Small Lot Runs
Contour Dress and Grind
•	CNC Programmable Profiles

Automatic Quill Changing
•	Less Downtime
Indexing Wheelhead Turret
•	Multi-Spindle Efficiency
CNC Wheel Speed Control
•	Constant Surface Speed
Peak Motor-Load Infeed
•	Ultimate Cutting Efficiency
Stock Sensor
•	Crash Protection and NO "Grinding Air"
In-Process Gaging

Rotary Contour Grind
•	For Grinding Non-Cylindrical or Eccentric Surfaces
Hydrostatic Slides

Push Button Size Correction
•	Size Adjustment without Reprogramming
CNC Wheel Speed Control
•	Constant Surface Speed