KRC Horizontal Boring Mill (HBM) Series

 

KRC's HBM Series offers the latest in horizontal boring precision and performance.

  • Design Flexibility – The KRC HBM Series is a full line of table type and floor type Horizontal Boring Mills made to support a wide range of applications for machining large, heavy-duty workpieces. Built for extreme-duty roughing and high precision finishing, these horizontal boring mills offer modular designs and flexibility to meet the demands of various processes. 
  • Superior Rigidity and Stability – The main structural components of these machines are made with high-quality alloy castings made according to Meehanite process and a heavily ribbed design allowing for maximum rigidity, vibration dampening and thermal stability.
  • Incredible Accuracy and Speed –  The hydrostatic guideways allow for incredible accuracy and speed, work-piece finish for longer tool life, and stiffness and durability.
  • Customizable –  All models can be custom configured in various machine styles, heads, control systems, travel specifications and performance options providing a highly versatile machine tool to meet your application demands.

 

HBM T-Series

Table Type HBM Series

HBM F-Series

Floor Type HBM Series

 

KEY FEATURES

hydrostatic guideways

HYDROSTATIC GUIDEWAYS

Hydrostatic guideways can compensate for forces resulting from weight, machining and acceleration. These ways are ideal for horizontal applications, where machining and acceleration forces are lower than the weight forces on the pockets. The result of a hydrostatic way system includes better dampening characteristics, no vibration, minimal wear due to zero contact of surfaces, and no stick slip.

COMBINATION BOX WAY SYSTEM FOR Y-AXIS

The Y-axis is equipped with a combination way system consisting of a box way with low friction material opposite tychoway bearings on hardened steel. The design provides the rigidity and dampening of sliding type box ways and the high accuracy contouring of bearing type guideways resulting in long term durability and reliability.

combination box way system for y-axis
hydraulic counterbalance system

HYDRAULIC COUNTERBALANCE SYSTEM

The column features a hydraulic counterbalance system designed to provide power loss back up and improved axis performance. An advantage of this design provides oscillation free movements from feed rates thru rapid traverse rates. This system helps to maintain a level machine head when either the ram or spindle is extended or an accessory head is utilized.

3 STEP GEARBOX HEADSTOCK DESIGN

The headstock design features a modular 3 step gearbox which generates high torque, high speed and high horsepower for efficient part processing. The 3 step gearbox is designed and positioned for easy removal as a unit without disassembling the ram and spindle unit. The gearbox design also provides near constant power from base speed allowing the use of optimum cutting parameters.

3 step gearbox headstock design
patented spindle design

PATENTED SPINDLE DESIGN

The patented spindle design features the best dynamic performance available. Designed with a roller and ball bearing arrangement, the spindle has a hard nitrided surface and travels in a tempered steel sleeve for maximum support, rigidity and long wear. The spindle length is the shortest in the industry with equal w-axis travel. This allows for high rigidity, higher speed and increased accuracy.

HYDROSTATIC ROTARY TABLE DESIGN

Bearing Crossed Roller or Hydrostatic Bearing improves rigidity and accuracy
Drive Dual pinion with split worm transmission
Split worm anti-backlash Hydraulic preload vs. typical spring preload
Automatic adjustment
hydrostatic rotary table design

HBM SPECIFICATIONS

 

KRC FHB  Specifications  Unit HBM-16F HBM-20F HBM-26F
Spindle Head Boring Spindle Diameter mm (inch)  165 (6.47)  200 (7.87)  260 (10.24)
  Spindle Taper    ISO 50  ISO 50/60  ISO 50/60
  Max Spindle Speed RPM  3,150  2,000  1,600
  Spindle Power kW (HP)  71 (95) / 88 (118)  100 (134) / 126 (169)  130 (174) / 161 (216)
  Max Torque Nm (Ft Lb)  10,000 (7,376) / 12,400 (9,146)  18,000 (13,280) / 22,600 (16,670)  25,000 (18,8440) / 30,900 (22,790)
Machine Travels Column Travel (X-Axis) mm (inch)  3,000 (118) + N ° x 1,000 (39.4)  4,000 (157.5) + N ° x 1,000 (39.4)  6,000 (236.2) + N ° x 1,000 (39.4)
  Spindle Head Travel (Y-Axis) mm (inch)  2,000 (78.7) to 4,000 (157.5)  2,500 (98.4) to 5,000 (196.9)  3,000 (118.1) to 7,000 (275.6)
  Ram Travel (Z-Axis) mm (inch)  1,200 (47)  1,500 (59)  1,800 (80)
  Boring Spindle Travel (W-Axis) mm (inch)  1,000 (39.4)  1,250 (49)  1,500 (59)
  Boring Spindle & Ram Travle (Z + W Axis) mm (inch)  2,200 (86.6)  2,750 (108.3)  3,300 (1300)
  X, Y Rapid Travels mm/min (IPM)  16,000 (630)  12,000 (472)  10,000 (394)
  Z, W Rapid Travels mm/min (IPM)  10,000 (394)  10,000 (394)  10,000 (394)
 Rotary Table Table Size mm (inch)  2,000 (78.7) x 2,000 (78.7)  2,500 (98.4) x 2,500 (98.4)  3,000 (118) x 3,000 (118)
  Max. Table Load kg (lb)  20,000 (44,040)  30,000 (66,060)  40,000 (88,080)
Machine Dimensions Machine Weight kg (lb)  75 (165,300)  90 (198,400)  110 (242,500)

 

KRC THB  Specifications  Unit HBM-13T HBM-16T
Spindle Head Boring Spindle Diameter mm (inch) 130 (5) 165 (6.5)
  Spindle Taper   ISO 50 ISO 50
  Max Spindle Speed RPM 4,000 3,150
  Spindle Power kW (HP) 37 (50) / 46 (62) 51 (68) / 68 (91)
  Max Torque Nm (Ft Lb) 2,500 (1,844) / 3,100 (2,286) 4,150 (3,061) / 5,500 (4,057)
Machine Travels Table Travel (X-Axis) mm (inch) 2,000 (78.7) 2,500 (98)
  Spindle Head Travel (Y-Axis) mm (inch) 1,600 (63) 2,000 (78.7)
  Column Travel (Z-Axis) mm (inch) 1,250 (49) 1,500 (59)
  Boring Spindle Travel (W-Axis) mm (inch) 750 (29.5) 1,000 (39.4)
  X, Y, Z Rapid Travels mm/min (IPM) 20,000 (787) 16,000 (630)
  X, Y, Z Increased Rapid Travels mm/min (IPM) 25,000 (984) 20,000 (787)
  W Rapid Travels mm/min (IPM) 10,000 (394) 10,000 (394)
 Table Specifications Table Size mm (inch) 1,250 (49) x 1,600 (62) 1,600 (63) x 2,000 (78)
  Max. Table Load kg (lb) 10,000 (22,020) 20,000 (44,040)
Rotary Table Specifications Table Size mm (inch)  1,250 (49) x 1,600 (62) 1,600 (63) x 2,000 (78)
  Max. Table Load kg (lb) 10,000 (22,020) 20,000 (44,040)
Machine Dimensions Machine Weight kg (lb) 45 (99,210) 55 (121,300)

 

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Many clients rely upon KRC Machine Tool Solutions because we overcome difficult challenges with sound, simple results. We’ll meet your timeline and surpass your objectives. Contact us for more information about our specialty machine solutions.