Technology for the World KURAKI

How to select a horizontal boring machine and table variations

Guide to selecting a Horizontal Boring & Milling Machine

KURAKI has as many Horizontal Boring & Milling Machine models to fit our customers’ needs. Here are some points to assist in selecting the optimal machine for your requirement.

Points for selection

Point 1. Select by a spindle diameter

The main spindle of the KURAKI Horizontal Boring & Milling Machine is a feeding type with a spindle diameter 110 mm, 130 mm, or 150 mm. Normally, the larger the spindle diameter, the stronger the twisting rigidity becomes for heavy-duty cutting. For machining soft materials like aluminum, a high-speed quill spindle is recommended.

Point 2. Select by a workpiece weight and size

Confirm that the workpiece to be machined matches the machine table size (worktable size) and workpiece allowable mass. Select a bigger size than expected, not an exact size for the workpiece, so that the optimal machine performance can be performed.

Point 3. Select by an axis travel

Axis travels vary depending on the workpiece machining positions and the machining widths. The larger the W-axis (Quill travel), the deeper the machine can cut. The larger the X-axis and Y-axis values become, the wider and higher the workpiece can be.

Movement coordinate axes of Horizontal Boring & Milling Machine

  • X axis travel…Table longitudinal
  • Y axis travel…Spindle vertical
  • Z axis travel…Table/Column cross
  • V axis travel…Spindle cross *In the case of KBT-15HMAX and KBF-15H.
  • W axis travel…Spindle axial

Comparison table of Horizontal Boring & Milling Machine per spindle diameter

Boring Spindle Dia. 110mm

X axis travel : mm (inch)1500 (59.06)1700 (66.93) 2000 (78.74)2500 (98.43)
Y axis travel : mm (inch)1200 (47.24)1500 (59.06)1800 (70.87)
Z axis travel : mm (inch)700 (27.56)1150 (45.28)1450 (57.09)1200 (47.24)
W axis travel : mm (inch))350 (13.78)500(19.69)
Table work space : mm (inch)950×1050 (37.40×41.34)1200×1400 (47.24×55.12)1400×1600 (55.12×62.99)1400×1750 (55.12×68.90)
Table maximum loading capacity : kg (lbs)3500 (7700)
4000 (8800)
5000 (11000)6500 (14300)7500 (16500)
10000 (22000)
Spindle speed (min-1)5~3000

Boring Spindle Dia. 130mm

X axis travel : mm (inch)3000 (118.11)
Y axis travel : mm (inch)2000 (78.74)2300 (90.55)
Z axis travel : mm (inch) 1300 (51.18)1600 (62.99)
W axis travel : mm (inch) 700 (27.56)650 (25.59) 700 (27.56)650 (25.59)
Table work space : mm (inch)1800×2200 (70.87×86.61)2000×2200 (78.74×86.61)
Table maximum loading capacity : kg (lbs)12000 (26400)20000 (44000)
Spindle speed(min-1)5~30005~40005~30005~4000

Boring Spindle Dia. 150mm

X axis travel : mm (inch)3000 (118.11)4000(157.48) / 5000(196.85) / 6000(236.22) *
Y axis travel : mm (inch)2000 (78.74)2300 (90.55)3000 (118.11) / 4000(157.48) *
Z axis travel : mm (inch) 1300 (51.18)1600 (62.99)1600 (62.99) / 2000 (78.74) *
V軸移動量(mm)750 (29.53)
W axis travel : mm (inch) 700 (27.56)900 (35.43)
Table work space : mm (inch)1800×2200 (70.87×86.61)2000×2200 (78.74×86.61)2400×2800 (94.49×110.24)
Table maximum loading capacity : kg (lbs)12000 (26400)20000 (44000)30000 (66000) / 40000 (88000)
Spindle speed(min-1)5~2500

*The X-, Y-, and Z-axis travels of KBT-15MAX and KBT-15HMAX can be selected as you wish.

Table Variation
Varied Selections for Numerous Purposes

KURAKI provides various tables configurations for workpiece sizes and machining capability.

Rotary Table (standard)

The standard rotary tables of the KBT series can rotate 360° at every 0.001° both right and left by NC for high-accuracy indexing. In addition to the multi-face machining effectively completed by only one setup, Continuous rotary milling during table rotations is possible in addition to one-setup multi-face machining.

Plain Table

Corresponds to machining of heavy-duty and long workpieces by eliminating the rotary function and widening the table width. Effective continuous machining is also available by one setup of multiple same-shape workpieces on a table.

Combination Tables

A sub table at each side of the rotary table for long or multiple workpieces is designed to locate at a position lower than the rotary table not to interfere with a workpiece. Each table can have a different workpiece on it. Moreover, the use of a dedicated fixture (parallel block) can better hold a long workpiece when machining.

Automatic Pallet Changer (APC)

Use of multiple pallets can allow other workpieces to be used to setup multiple pallets for increased productivity. After machining, the pallets are automatically changed, increasing unmanned operation and improving energy efficiency and productivity. More pallets equal longer unmanned operation of the machine.

Trunnion table (rotary axis and tilting axis)

The 360° rotary table with a tilting axis (+20° to −105°) enables not only accurate 5-axis machining but also multi-task machining in one setup.

Table Function Chart

One-face machiningMulti-face machiningTilted-face machiningRotary millingLong workpieceSetup efficiencyContinuous machining of multiple workpiecesUnmanned operation
Rotary Table (standard)

Plain Table

Combination Table

Automatic Pallet Changer (APC)

Trunnion table