Keith Machinery Corp.

Three Roll Mill Services

TRM FIELD SERVICES:

  • KMC has servicemen available for field service throughout the world. These servicemen regularly do emergency repairs, routine annual maintenance trips, and mill disassembly/reassembly for Roll Set Jobs and Roll Set Switches. In this type of service trip, the customer is charged on a portal-to-portal basis from New York.
  • KMC also has prescheduled service trips (PSTs) to the West Coast, Midwest, Southeast, and Texas. On these trips, our service team normally consists of four or five servicemen, and our teams are domiciled in appropriate cities as required. The customer is charged on a portal-to-portal basis from the domicile. In this way, airfare, per diem, etc., are not charged, and expenses are kept to a minimum.
    • The manager of our Three Roll Mill Shop will also visit these domicile cities at least twice each year. These trips are sales/inspection trips required to organize our service trips, as well as doing plant inspections. If done in conjunction with a PST, there is no charge for a KMC Inspection Trip. The customer will receive a written Three Roll Mill Inspection Report, a written Plan of Attack, and written Proforma Invoices for the work that our manager recommends.

MILL REPAIR PROGRAMS:

  • ROLL SET JOB PROGRAM:
    • In this case, the mill is disassembled and the roll set is sent into our shop for work. Upon receipt, the roll set is disassembled, inspected and a detailed Proforma Invoice is prepared. The Roll Set is then remanufactured, reassembled, and sent back to the customer. (A more complete discussion regarding this program can be obtained by clicking on the link above.) The roll set is normally at KMC for approximately 6 weeks, and the mill is normally down for approximately 8 to 9 weeks.
  • ROLL SET SWITCH PROGRAM:
    • In this case, KMC ships a remanufactured roll set to the customer. Once received at the customer's site, the mill is disassembled, the remanufactured roll set is installed, and the mill is reassembled and tested. (A more complete discussion regarding this program can be obtained by clicking on the link above.) The mill is normally down for approximately 5 days.
  • MODIFIED ROLL SET JOB PROGRAM:
    • In this case, the customer sends the entire mill into our shop for work. The mill is disassembled, inspected, and a detailed Proforma Invoice is prepared. A Roll Set Job is then accomplished, and the mill is reassembled and tested. The mill is normally at KMC for approximately 8 weeks and the mill is normally down for approximately 10 weeks.
  • MILL REMANUFACTURE PROGRAM: 
    • In this case, the customer sends the entire mill into our shop for work. The mill is disassembled, inspected and a detailed Proforma Invoice is prepared. The mill is then remanufactured and tested. (A more complete discussion regarding this program can be obtained by clicking on the link above.) The mill is normally at KMC for approximately 8-14 weeks and the mill is normally down for approximately 9-16 weeks.
  • APRON PROGRAM:
    • Customers have a number of choices when it comes to the repair of an apron. The simplest choice is the Apron Switch. In this case, a remanufactured apron is sent to the customer, and once installed, the old apron is sent back to the KMC shop. With an Apron Switch, the mill is down for only a few minutes. With the Apron Remanufacture, the customer sends the apron to our shop for work. The apron is remanufactured and sent back to the customer for reinstallation. In this case, the apron will be at the KMC shop for approximately 2 weeks, and the mill will be down approximately 3 weeks.  KMC also manufactures new aprons for all mills.
  • ENDPLATE PROGRAM:
    • KMC manufactures new endplates for all TRMs.  In years past, the normal procedure would be for the customer to send a set of endplates to the KMC shop, for a “rebore”.  The rebore consisted of cutting of the top of the existing endplate, machining the endplate to accept a new oversize top casting, attaching the new tip casting, and then machining the endplates for the correct roll diameter and bevel measurements.  With a rebore, the endplates would typically be at the KMC shop for 2 to 3 weeks.                                                                                                                                                                                                                                                    
    • Since 2000, the standard program is an “Endplate Switch”.  With an Endplate Switch, the customer supplies the roll diameter and bevel measurements.  KMC manufactures and invoices for a new set of endplates, and the new set of endplates is shipped to the customer.  The customer removes the old set of endplates and installs the new set of endplates on the mill.  The old set of endplates are sent back to KMC.  If the old set of endplates are “reboreable”, then KMC will issue a credit, only charging for the rebore price.  With an Endplate Switch, the TRM will only be down for one day.

Note:

1)      The customer is responsible for roundtrip freight on the set of endplates.

2)      Endplates for Day or Lehmann TRMs are designed to ride on the roll bevels.  These endplates require “hand fitting”.  

  KMC has servicemen who are experts in this process. 

  It normally takes 2 to 5 hours to do this installation.