Knuth 1.5HP 20” Multi-Grind Universal Grinder 102781

Description

The special construction of the Multi-Grind makes it possible to combine the functions of cylindrical, flat, and tool grinding in one machine. With external cylindrical grinding, the workpiece is either clamped on one side or supported between centers in the stable tailstock. An internal grinding device can also be attached to the headstock and light surface grinding work is also possible with this model. With the additional tool grinding function area, you can use the Multi Grind to machine the cutting edges of a large number of tools.

The functionality of the Multi-Grind ranges from external and internal cylindrical grinding to taper grinding. The Multi-Grind also allows easy tool grinding (sharpening of cutters, reamers and turning tools) and is suitable for light surface grinding jobs.

Features

• Three-Point Bearing The custom three-point bearing of the grinding spindle ensures minimum temperature effects and consistent grinding quality.
• Feed Drives Hydraulic table feed (longitudinal) with automatic change of direction. An additional manually operated longitudinal feed with hydraulic support allows feed speeds up to 275"/min.
• Grinding Headstock Special grinding headstock design allows simultaneous setup of 2 different grinding wheels. The grinding headstock can be moved in transverse direction and vertically; and it can be rotated around the vertical axis.
• Speeds The headstock operates at 3 different speeds (110, 200, 300 rpm) which are set through an easy to operate gear shift lever.
• Additional Features: central lubrication system; sturdy construction; the KNUTH Multi-Grind body is made of solid cast-iron and weight 2,860 lbs.; minimizes vibration effects; electrical components are mounted easily accessible in a control cabinet

Standard Equipment

• Coolant system
• Exhaust vacuum
• Tool mount / indexing head MT 4
• Internal grinding unit including 2 die grinders
• 3-jaw chuck (4" diam.)
• Left tailstock
• Right tailstock MT 2
• Center point
• Half center points
• Balancing station
• Spindle extension
• Vise for surface grinding (3-D angle adjustment)
• Spring stop
• 5 drivers
• Various splash guards
• Grinding wheel guard (2x)
• Automatic central lubrication
• Operator manual
• Test certificate

Specifications

• Working Area
  • Workpiece length (max.): 20”
  • Workpiece weight (max.): 22 lbs.
  • Grinding diameter: 7.9”
  • Table swivel range (max.): +45° / -30°
  • Outside grinding measure, maximum: Ø 0.2-2. x 15.8”
  • Inside grinding measures, optimal: Ø 0.4-2 x 3”
  • Tool grinding measure: 8” x 20”
  • Work piece length surface grinding: 8”
  • Work piece width surface grinding: 2”
• Travels
  • Travel Z-axis: 19”
• Feed
  • Feed per hand-wheel rotation X-axis, fine: 0.0394”
  • Feed per hand-wheel rotation X-axis, rough: 0.1575”
  • Feed per scale division X-axis, fine: 0.0002”
  • Feed per scale division, X-axis, rough: 0.00079”
  • Scale division of height adjustment: 0.00039”
  • Longitudinal feed speed (hydraulic): 0 fpm - 20 fpm
  • Manual, hydraulic assist: 23 fpm
• Headstock
  • Working spindle taper: 2 MT
  • Working headstock swivel range: ± 90°
  • Working spindle speed-stages: 3
  • Working spindle speed: 110 rpm - 300 rpm
  • Chuck diameter: 4”
• Grinding Headstock
  • Grinding spindle speed: 2500 rpm
  • Inside grinding spindle speed: 13500 rpm
  • Grinding headstock swivel range: ± 90
  • Grinding headstock - vertical / - transverse: 8”
• Tailstock
  • Tailstock taper: 2 MT
  • Tailstock quill stroke: 1”
  • Height adjustment per handwheel rotation: 0.04”
• Drive Capacity
  • Motor rating main drive : 1.5 Hp
  • Machine drive capacity: 3.4 Hp
• Measures and Weights
  • Overall dimensions (length x width x height): 60” x 54” x 56”
  • Weight: 2,860 lbs.
  • Grinding wheel dimensions: 7.87” x 0.79” x 2.95”
  • Grindstone dimensions, inside grinding (max.) (length x width): 1” x 0.8” x 0.2”
  • Grindstone dimensions, inside grinding (min.) (length x width): 0.4” x 0.4” x 0.1”

Options

• 106745 – Live Center MT 2
• 106780 – Live Centers, assortment MT 2
• 103184 – Coolant Concentrate 5 Ltr.
• 102877 - Diamond dresser shank