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How to avoid spindle failure caused by lathe rotary joints? OTT-JAKOB rotary joint
2023-09-23 10:37:19
For spindles that use through-tool coolant, the OTT-JAKOB rotary joint can be a common cause of failure. However, they are equally ignored – few include Rotary in their regular inspection procedures.
Rotary joints are special joints designed to connect fixed equipment to rotating equipment. In spindle applications, swivel joints allow connection of coolant lines, mount on the drawbar and interlock with the interior of the swivel joint (swivel). The swivel housing to which the hydraulic and coolant hoses are connected is fixed (does not rotate). The drawbar with the spindle is rotating, thus allowing coolant to flow through the joint, through the drawbar and towards the machining operation/part being machined.
The main cause of rotary joint failure is the seal. There are coolant pipe seals, hydraulic seals and face seals for the passage of coolant. If the seals wear out over time, spindle failure is sure to ensue.
Notes on the life of the rotary joint:
• Side loading of supply lines connected to ports, which may cause joint jumps
• Installing a union with a mounting surface that does not match the spindle specifications will cause runout
• Dead spots in the tool can prevent coolant from flowing through the drawbar, even temporarily
• High operating temperatures
• Running at RPMs that exceed union specs
• Operating at improper hydraulic and coolant pressures below or above specified ranges
• Allow/cause pressure spikes or pulsations which may cause contact seals to vibrate
• Improper residual pressure on the hydraulic seal during rotation, causing premature wear of the seal
• Using incorrect coolant type
• Improper or inadequate filtration, leaving internal seals and bearings susceptible to damage:
• Typically recommended filtration rating is 50 microns or less
• Filter media purity is listed in ISO 4409 -/17/14
• Consider the type of material being processed (for example, glass and cast iron are more abrasive than other types and require finer filtration)
The above content introduces how to avoid spindle failure caused by lathe rotary joints? Problem with OTT-JAKOB rotary joint. In addition, ODJ-Tech Global LLC specializes in selling brand new imported OTT-JAKOB rotary joints, and promises that all products sold are brand new and imported. At the same time, it provides customers with quotations, selections, product information and other services.
