HARDOX

is a wear-resistant plate characterised by its extreme hardness, high strength and excellent toughness. HARDOX is used wherever heavy wear has to be counteracted. It is used, for example, in excavator buckets, conveyor screws, conveyor cages, truck tipper bodies, etc.

FEIN magnetic core drilling machines

KBM / KBU with speed control + FEIN HM ULTRA core drill bits. KBM / KBU models are equipped with electronic speed control to adjust the speed to the respective drilling task. FEIN HM ULTRA core drills impress with a very high cutting edge hardness due to high-quality carbide tipping. However, HARDOX can only be processed with a FEIN KBM / KBU and a FEIN HM ULTRA core drill up to HARDOX classes 400 and 450. The service life of the core drill here is approx. 0.25 m*

HARDOX steels are categorised into different classes:

  • HARDOX 400  Hardness [HBW] 400 | Tensile strength [N/mm²] 1250
  • HARDOX 450  Hardness [HBW] 450 | Tensile strength [N/mm²] 1400
  • HARDOX 500  Hardness [HBW] 500 | Tensile strength [N/mm²] 1550
  • HARDOX 570  Hardness [HBW] 570 | Tensile strength [N/mm²] 1995
  • HARDOX 620  Hardness [HBW] 620 | Tensile strength [N/mm²] 2200

To ensure successful core drilling

in HARDOX 400 and 450, the following points must be observed:

  • Use only new, unused FEIN HM ULTRA carbide core drills.
  • Adjust the speed for the optimum core drill cutting speed (see HARDOX speed chart)
  • Keep the distance between the core drill and the workpiece as small as possible by setting a low stroke
  • Use plenty of cooling lubricant. Open the coolant tap as far as it will go and ideally also cool from the outside
  • Use a low feed force during drilling
  • In one go without stopping or retracting through the material. HARDOX reacts immediately to the influence of heat

Properties of the FEIN HM ULTRA core drill

  • High performance in all metals
  • Cutting edge made of durable carbide
  • Cutting edge heat-resistant up to 1,200° C
  • Heat-resistant up to 800° C
  • Cutting edge hardness of 1,450 HV
  • High concentricity (150 µm)
  • Cutting width max. 4 mm

Speed table HARDOX 400 and 500

 

HARDOX 400

HARDOX 450

Vc [m/min]

~ 20

~ 15

Ø 15 mm

430     1/min

320     1/min

Ø 20 mm

320     1/min

240     1/min

Ø 25 mm

250     1/min

190     1/min

Ø 30 mm

210     1/min

160     1/min

Ø 35 mm

180     1/min

140     1/min

 

FEIN magnetic core drilling machines

KBU 35 QW
KBU 35 QW

Universal magnetic core drill for up to 35 mm

KBU 35 QW

Small and powerful single-speed universal magnetic core drill with clockwise/anti-clockwise operation and…

BOSCH AMPShare
AKBU 35 PMQW AS
AKBU 35 PMQW AS

Cordless universal magnetic core drill for up to 35 mm

AKBU 35 PMQW AS

Small and powerful single-speed cordless universal magnetic core drill with forward/reverse running, MT2 tool…

KBM 50 Q
KBM 50 Q

Metal core drilling unit up to 50 mm

KBM 50 Q

Lightweight and powerful 2-speed universal magnetic core drill with clockwise/anti-clockwise operation and…

KBM 65 U
KBM 65 U

Metal core drilling unit up to 65 mm

KBM 65 U

Powerful and very high-performance 2-speed universal magnetic core drill with clockwise/anti-clockwise…

FEIN HM ULTRA Kernbohrer

Cutter finder and core drill accessories

Find the right cutter / core drill bit for your use case

Cutter / core drill finder

* 20 drill holes with FEIN HM ULTRA Ø 18 mm in HARDOX 400, 12 mm thick