QUALITY. Over and over again.
CNC Grinders  |  Robotic Automation  |  Bakery Automation


Weldon Solutions CNC Grinders

Flexible Large Part OD Grinder

The Weldon Altaira CNC cylindrical grinder is designed to satisfy processing of large, work parts up to 1 meter (40”) in length. Rotary and linear axes are sealed from airborne contaminates providing unmatched longevity in carbide and ceramic grinding applications.

Available with either a straight or angular wheel head (factory set) the Altaira can grind outside diameters, shoulders, and faces in a single set-up. The CNC control can address complex form grinding (tapers, radii, etc.) via form dressed wheels or profiling. Properly equipped, an Altaira is ideally suited for high speed Peel grinding with CBN abrasives. Additionally, a programmable ”C” axis package can be provided to accommodate non-round grinding applications.

Download a PDF of our Altaira Brochure

Read our latest Altaira Case Studies:


FANUC model 32i B CNC control with color LCD, and servo drives featuring FANUC AC digital technology.
Battery backup absolute feedback system eliminating the need to reference at each start-up.
Shear Damper design machine base providing stiffness, vibration control, and thermal stability through the use of steel shear tubes covered with a viscous material and encapsulated with a special replicating resin.
Cross-roller linear way system with recirculating bearings and precision ground rails. Includes integral way bearing seals and an external wiper system.
Compound linear slide design to keep floor space requirements to a minimum.
Z axis linear motor, FANUC. X axis precision ballscrew assembly or FANUC linear motor, determined by application.
Heavy-duty live spindle workhead with 6” A2 spindle nose and #5 MT center. Features a 4.7” spindle diameter and a quad set of angular contact bearings.
Automatic Trabon lubrication system, monitored by the control, with lube fault protection.
Heavy-duty tailstock, hydraulically operated, with #5 MT center. Includes manual taper adjustments with eccentric quill design.
Variable speed wheel drive, CNC controlled with dynamic braking. Normally arranged for constant surface speed as the grinding wheel wears.
Stainless steel telescoping way covers.
Full enclosure with manually operated dual sliding door assembly and both side and rear maintenance access panels.


22” swing capacity for faceplates and fixturing to accommodate larger workparts.
In-process gage for automatic size control.
Automatic lateral locator, wheelhead mounted, featuring a Renishaw probe.
Acoustic emissions sensor for gap elimination, crash detection, and touch dressing.
Programmable workhead with Heidenhain rotary scale, for non-round applications.
Electric rotary dressing systems for superabrasive dressing or extended diamond life when processing with standard abrasives.
Work holding solutions can be addressed with a variety of systems such as manual and powered jaw chucks, collet chucks, magnetic faceplates, vacuum chucks, expanding arbors, pitch-line chucks, and custom fixtures.
Automation involving gantry systems, FANUC 6 axis robots, or custom alternatives can be factory integrated on a turnkey basis.
Coolant supply and filtration systems are available to suit any application; magnetic, fabric, cyclonic, pressure, and combination filtration units can be provided.

General Specifications

Machine Capacities
Maximum work swing: 16”
Maximum distance between centers: 40”
Worktable travel: 53”
Wheel spindle slide travel: 13.5”

Heavy-duty, preloaded precision antifriction bearings
Spindle nose (ASME standard): 6”A2
Center taper: #5 Morse
Through-hole diameter in spindle for draw bars and knock-out" 1.0625”
Spindle speed range is infinitely variable and programmed by percentage with manual speed override located on operator control station: 0 - 900 RPM
Maximum runout: 0.000050”
Motor, FANUC AC servo drive: 5.0 HP

Angular contact ball bearings which allow lateral loading while contouring with wheel edge
Motor: 25 hp, T.E.F.C.
Wheel speed variable RPM: 8,500 SFPM (nominal)
Maximum OD wheel diameter: 24”
Maximum wheel width: 5.0”

Center taper: #5 Morse
Quill retraction (hydraulic): 3”

Table Drives
FANUC AC digital servo drives: 1.9 HP
Command resolution, least programmable increment: 0.000010”
Position feedback resolution: 0.0000010”
Precision ground preloaded ballscrew on X-axis
FANUC linear motor on Z-axis
Way construction: Hardened and ground cross rails
Bearings, preloaded: Cross-roller

Wheel spindle: Permanent grease-packed
Workhead spindle: Permanent grease-packed
Ballscrews: Automatic lube oil
Ways: Automatic lube oil
Safety detect interlock to prevent cycling of operation if low air pressure or low oil level is sensed
Automatic programmed cycle to lubricate machine at start-up

Electrical Specifications
Complete electrical equipment wired in accordance with IEC
electrical standards for metalworking machine tools
Standard voltage: 460 volts, 3-phase, 60 Hertz, AC
(Any other voltage must be referred to factory for price and delivery.)

Pneumatics (air moisture: 70&Mac176; F. dew point maximum)
Air pressure: 80 PSI
Air volume: 5 SCFM

Coolant System
Machine is set up to pump coolant out to an optional coolant filter or tank system from a sump tank. All necessary piping and solenoids for coolant control from the machine control are provided.

CNC Control Specifications - FANUC 32i B
Manual pulse generator
Full linear and circular contouring and positioning capabilities
FANUC AC digital servo systems
Direct rpm programming or constant surface feet per minute
10” high-resolution color LCD
Macro subroutines
Automatic recognition of EIA or ISO coding
Absolute/incremental programming
RS 232 interface

Machine Dimensions and Construction
Width: 144”
Depth: 130”
Height: 94”
Weight: 22,000 lbs.
Construction: Welded steel Shear DamperTM
Foundation: 6” concrete floor is recommended
Multi-point anti-vibration suspension system requiring no floor attachment