KMA-3H

Long. x Cross Travel59 (79 Opt) x 23.6 in.
Vert. Head Travel27.5 in.
Horiz. Head Travel25.5 in. (up, down)
Vert., Horiz. Taper, HP#50, #50, 20 HP, 7.5 HP

Overview

This model has both vertical and horizontal heads. Bed type vertical mills are ideal for milling large work piece or heavy cutting on hard metals. The quill is fixed so it can withstand strong lateral forces. For this model, the entire vertical head moves up to 28” that enables deep drilling and boring operations. The large spindle with #50 taper can remove large amount of metals in one pass. The horizontal head with 7.5 HP motor and #50 taper spindle driven by  AC servo motor on ballscrew performs horizontal milling operations with high accuracy.  This arrangement allows the performing of different type of milling operations on one set up, thus maintain accuracy and increase productivity.

  • 20” x 87” table, 24” x 59” travel
  • Vertical head travel 28”, fixed quill
  • NST #50 taper spindle, 20 HP motor
  • The Horizontal head has NST#50 spindle taper,7.5 HP motor. The head is driven by AC servo motor on precision ball screw for precise and easy operation.
  • Hardened and ground box ways
  • Fully ribbed castings on column, table and saddle to make it a rigid structure
  • Double nut backlash eliminator
  • Eye-level lever control for vertical head rapid traverse

Features

Solid Construction, Box Way Design

High quality castings are used on base, column, saddle and table. They are stressed relieved to avoid any distortion. All sliding surfaces are hand scraped to ensure full bearing support. All reference surfaces and T slots are precision ground to exact tolerances

Honeycombed Ribbing on Column

The vertical column of a bed mill usually received most pressure during heavy duty milling operations. Honeycombed pattern ribbings enhance rigidity of the casting.

Double Nut Backlash Eliminator

Backlash on the screw increases after long term usages. The backlash eliminator can correct the situation by adjusting the double nuts instead of the old method of squeezing a split nut.

Eye-Level Tri-Lever Handle Vertical Head Movement

Despite the heavy duty vertical spindle head, it is easy to move the head up and down manually using the tri-lever handle for positioning or close milling jobs.

Additional control for Horizontal Head

The operating panel has additional buttons and switches for the horizontal head with horizontal spindle start, stop and jog. It has manual and auto horizontal head feed, rapid feed with feed override. It also has  an electronic handwheel (MPG) for controlling the up and down feed of the head with ease.

Additional Horizontal Milling Head

The horizontal milling head with a fixed quill travels along the side of the column driven by AC servo motor on precision ball screw.  It is equipped with NST#50 spindle taper, runs on 7.5 HP spindle motor. The head has 12 spindle speeds from 40-1,450 rpm.

Specs

CapacityInchMetric
Table Size19.68 x 86.62 in.499.87 x 2200.14 mm
T-slots (No.x Width x Pitch)5 x 0.75 x 3.56 in.

5 x 19.05 x 90.42 mm

Table Travel : X Longitudinal59 in. (79 in. Opt)1498 mm (2,006 mm Opt)
Table Travel : Y Cross23.6 in.599 mm
Vertical Head Travel27.5 in.698 mm
Horizontal Head Travel25.5 in. (up, down)647 mm
Vertical, Horizontal Taper, HP#50, #50, 20 HP, 7.5 HP
Spindle Center to Column21.62 in.549.14 mm
Spindle Nose to Table4-31.5 in./min101.6-800.1 mm/min
Distance Between Vertical and Horizontal Spindle21.5 in.546 mm
Table Feeds, RapidsInchMetric
Longitudinal Feeds (Variable)1.12 - 39.37 ipm26 -1000 mm/min
Longitudinal Rapids

129-7/8 ipm

3300 mm/min

Cross Feeds (Variable)1.12 - 39.37 ipm26 -1000 mm/min
Cross Rapids

129-7/8 ipm

3300 mm/min

Vertical HeadInchMetric
Spindle Nose TaperNST #50
Spindle Speeds (12)45 - 1500 rpm
Vertical head Travel

25-9/16 in.

700 mm

Vertical Head Feeds

0.002-0.008 in/rev

0.05-0.2 mm/rev

Horizontal HeadInchMetric
Spindle Nose TaperNST #50
Spindle Speed (12)

40 - 1450 rpm

Horizontal Head Travels25.5 in. (up, down)647 mm
Vertical Rapids150 ipm3800 mm/min
MotorsInchMetric
Vertical Spindle20 HP14.91 Kw
Horizontal Spindle7.5 HP5.59 Kw
Table Feed and Rapid

4.7 HP

3.5 Kw

Vertical Rapid

1.14 HP

0.85 Kw

Coolant System0.125 HP0.093 Kw
GeneralInchMetric
Floor Area (W x D x H)14.58 x 8.33 x 9.41 ft.4.44 x 2.53 x 2.86 M
Approximate Weight

19,140 lbs.

8,700 Kg

Power Consumption (220V)60 amps
Power Consumption (440V)30 amps

Accessories

Standard Accessories

  • Coolant system
  • Auto lubrication system
  • Draw-in bolt (1 pc)
  • Tool box
  • Wired 220V or 440V

Optional Accessories

  • Power drawbar w/ foot pedal control
  • 6 in. “KURT” vise with swivel base D688
  • Halogen work light
  • Outboard support of table to increase longitudinal travel

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