CNC Spindle Repair

Motor City Machine Tool Repair specializes in remanufacturing spindles for CNC machine tools for Machining Centers,Turning Centers & High Frequency Grinders. Some of the most popular brands we service are: BRYANT, ENSHU, SETCO, MAZAK, HARDINGE, MASTER, WHITNON, KITAMURA, MOORE, NIIGATA, SETCO, UVA, PARKER, POPE, GAMFIOR, NTC, GMN, and literally hundreds and hundreds more. All Quotations are 100% free of charge and are accompanied by a detailed failure analysis report as well as the scope of work needed to bring your unit back to the OEM spec. We hire only the most experienced technicians. Many of whom worked directly for foreign and domestic OEMs. All spindles are fully tested and ran at maximum rpm.

Warranty: 1 Full Year after installation Standard: 1-3 Weeks ARO Emergency Repairs: 2-5 Days (Excessive wear requiring GPG may add additional lead time)

Spindle Repair Testing

Motor City Spindle Room

All spindles rebuilt by Motor City Machine are test run to maximum rpm. Spindles are initially rotated at 5% of maximum speed while bearing temperatures & vibration signatures are checked and digitally recorded. Once all test readings past specification the rpm is increased by 10% intervals until maximum rpm is achieved. Vibration signatures are recorded and documented each step of this run in process. After all vibration signatures and balance readings past inspection at maximum rpm the spindle is ran for an additional 1-2 hours. Draw bars are actuated and tested for proper pull force retention and these readings are taken digitally and recorded. Only after all bearing temperature readings, vibration signatures, balance, draw bar pull force retention, and sensors are within specification is the unit approved for shipment.

Enshu

Pope

G&L MAG

NSK

Setco Colonial Okuma

Spindle  Balancing  and  Spindle  /  Draw  Bar  Tes3ng    

All  Spindles  are  fully  test  run  and  balanced  at  max  rpm.    Draw  bar  pull  force  is  tested  to  be  at  OEM  Specifica=on.        All  tes=ng  data  is  documented  and  available  for  the  customers  review.  

 •  Rotate  spindle    on  test  stand  directly  from  motor  leads  to  one  of  our    variable  frequency  drive  or  external  motor  at  (5%)  of  

maximum  rpm.  •  Run  spindle  for  30  minutes  while  con=nuously  checking  all  spindle  bearing  temperatures  do  not  exceed  120  degrees.  •  If  any  spindle  bearing  temperature  exceeds  120  degrees  stop  spindle  and  allow  it  to  cool  to  ambient  temperature  or  

completely  cool  below  80  degrees.  •  Take  vibra=on  readings  of  all  spindle  bearings  signatures  and  verify  they  are  with  in  the  oem  specifica=on.    •  Take  balance  readings  of  the  spindle  assembly  in  both  the  front  and  rear  bearings  loca=ons  and  verify  proper  balance.    •  If  all  spindle  bearing  temperatures  remain  below  120  degrees,  bearing  signatures  and  balance  are  all  within  oem  

specifica=on  then  increase  spindle  rpm  by  5%.  

•  Repeat  this  en=re  process  by  increasing  rpm  at  intervals  of  (10%)  the  maximum  rpm  un=l  maximum  rpm  is  achieved.    If  at  any  =me  any  spindle  bearing  temperature  exceeds  120  degrees  stop  the  spindle  and  allow  the  bearing  temperature  for  the  en=re  spindle  to  drop  to  ambient  temperature  or  below  80  degrees.    Repeat  this  process  again  un=l  maximum  rpm  is  achieved.  

•  Once  maximum  rpm  is  achieved  all  spindles  are  test  run  for  an  addi=onal  (2)  hours.    Both  front  and  rear  (or  top  and  boQom)  spindle  bearing  vibra=on  signatures  are  verified  to  be  within  specifica=on.    Balance  is  also  rechecked  and  verified  to  be  within  specifica=on.  

•  All  spindle  tes=ng  procedures  are  documented  and  available  for  the  customers  review.    The  final  inspect  results  are  printed  and  placed  both  inside  the  container  the  spindle  is  shipped  in.    They  are  also  stapled  to  the  outside  of  the  contained  and  can  be  emailed  upon  request.  

 

Spindle  Run  In  and  Tes3ng  Procedure  

Motorized CNC Machining Center Spindle Repair

Setco, Colonial, Pope, & Master Whitnon Spindle Repairs

CNC Turning Center Spindle Repair