HITECO QE-1F 12/12 24 63F NC CB Spindle Repair

The FISCHER MFW-1224/42 VC HSK-E40 electrospindle operates in very demanding conditions: rotational speed up to 42,000 rpm, HSK-E40 tool interface and a high-precision SPEED HAWK 650 machining center. Under such parameters even minor wear of the bearings, taper or clamping unit quickly leads to reduced surface quality, increased vibration and shorter tool life.

The scope covered a full HOMAG spindle overhaul from a BIZ 411 machine, rated for 24,000 rpm and using an HSK 63F taper. It included comprehensive diagnostics, replacement of ceramic (hybrid) bearings, precision dynamic balancing, and HSK 63F drawbar rebuild and calibration. The entire process was organized on an expedited basis — delivery and on-site installation the next day after service completion. HOMAG electrospindles are our specialty — we know their construction down to the smallest detail.

Our service received the HITECO QX-2 11/12 24 63F NC electrospindle, used in a five-axis CNC machining center. The unit, operating at 24,000 rpm with an HSK63F taper, showed signs of instability and system communication errors that made further operation impossible.

The electrospindle was collected directly from the customer, located approximately 200 km from our service center. On the same day, we carried out a damage analysis and identified severe damage to the HSK taper gripper arms, as well as significant vibrations and loud operation of the rear bearings.

A spindle from a machining center DMG MORI arrived at our service. It is a KESSLER inlineMASTER unit with an ISO40 taper and a maximum speed of 18 000 rpm. The customer reported increasing noise at higher speeds, noticeable vibration during milling and occasional problems with tool retention. After a short interview about the machine’s operation, we proceeded to full diagnostics.

Two spindles from the renowned CHIRON brand, operating in machines from the same manufacturer and equipped with HSK 63A tapers, arrived at our service center. These components are crucial for maintaining the highest machining quality – responsible for transmitting torque to the tool and ensuring stability during cutting. In both cases, the customer reported clear signs of wear that negatively affected production: increased noise, noticeable vibrations and a drop in dimensional accuracy of machined parts.