Journal

CNC lathes and machining centers on a shop floor

CNC Coolant: Concentration, Pressure and Upkeep

How to run CNC coolant: checking concentration with a refractometer, pH, tramp oil and bacteria, flood vs through-spindle pressure, and when to change it.

CNC Coolant: Concentration, Pressure and Upkeep

How to run CNC coolant: checking concentration with a refractometer, pH, tramp oil and bacteria, flood vs through-spindle pressure, and when to change it.

CMM touch probes measuring a machined part

Spindle Probes and Tool Setters

What CNC spindle probes and tool setters do: work offset setup, in-process measurement, tool length and diameter, broken tool detection, and calibration.

Spindle Probes and Tool Setters

What CNC spindle probes and tool setters do: work offset setup, in-process measurement, tool length and diameter, broken tool detection, and calibration.

Pocketed CNC machined aluminum plates and brackets with a gray anodized finish

Linear Scales vs Rotary Encoders on CNC Axes

Semi-closed vs fully closed loop CNC axes: how encoders and linear scales measure position, why ball screw heat causes errors, and when scales pay off.

Linear Scales vs Rotary Encoders on CNC Axes

Semi-closed vs fully closed loop CNC axes: how encoders and linear scales measure position, why ball screw heat causes errors, and when scales pay off.

Pair of angular contact precision bearings

Spindle Bearings: Arrangement, Preload and Failure

How CNC spindle bearings work: angular contact sets, back-to-back and tandem arrangements, preload, grease vs oil-air, ceramic hybrids and failure signs.

Spindle Bearings: Arrangement, Preload and Failure

How CNC spindle bearings work: angular contact sets, back-to-back and tandem arrangements, preload, grease vs oil-air, ceramic hybrids and failure signs.

Mold bases, CNC tool holders and a tooling shop floor

CAT40 vs BT40 vs HSK63: Tool Holder Tapers

How CAT40, BT40 and HSK63 tool holders differ: taper, flange, pull stud thread, face contact, speed and accuracy, and why the wrong pull stud is dangerous.

CAT40 vs BT40 vs HSK63: Tool Holder Tapers

How CAT40, BT40 and HSK63 tool holders differ: taper, flange, pull stud thread, face contact, speed and accuracy, and why the wrong pull stud is dangerous.

Spindle of a 5-axis machining center above a part on a trunnion

Belt-Driven, Direct-Drive and Motorized Spindles

Belt-driven, direct-drive and motorized CNC spindles compared on speed, torque, heat, finish and repair, and which suits steel, aluminum or mold work.

Belt-Driven, Direct-Drive and Motorized Spindles

Belt-driven, direct-drive and motorized CNC spindles compared on speed, torque, heat, finish and repair, and which suits steel, aluminum or mold work.