Services Offered

• Reverse engineering of all gear related products.
• NRL/RDC paper machine Wire to Reel drive horsepower calculations and sizing.
• Drive Audits & Drive Speedup Studies: Review the drive capacity for future speed increases and recommend drive upgrades as required.
• New product design using finite element analysis.
• Failure analysis study of drive components.
• Drive plan and pier drawings, drive layouts for new or relocated drives.
• Differential gearbox repair, overhaul and testing (over 90 year’s experience), including the bevel gear cluster.
• Gearing inspections at mill site.
• Turnkey electric or mechanical drive equipment sizing and installation.
• Dryer gearing audits.

Machine Drive Speed ups - Differential or Belt Drive Systems

In-depth analysis of existing drive components determines the actual speed limitation. Limiting components can be redesigned or replaced with up-to-date components.

Preventative Maintenace Program (PMP) Justification

• Regular annual drive inspections and completion of required repairs virtually eliminate unplanned downtime due to failures
• Preventing unplanned downtime can save thousands of dollars per hour
• Allows maintenance planning through accurate assessment of rebuild requirements
• Reduce operating costs by eliminating expedited shipping costs
• Eliminate emergency travel requirements

Process, Technical & Maintenance Training

Maintenance and operations training is an integral part of a complete PMP. Paperchine can provide a customized program to meet your specific needs. Training sessions discussing differential drive design, function, operation, inspection and assembly procedures, PIV's, Mechtronic® systems, and troubleshooting techniques can be presented at your mill site. A hands-on session may also be included to enhance the educational experience.

Paperchine will examine in detail the mechanical components, lubrication flow, internal gear alignment and wear, proper bearing setup and gear tooth contact patterns. Paperchine will also propose the most cost effective maintenance program to meet your needs. With the assistance of 2-4 dedicated mechanics from Paperchine or provided by the mill, Paperchine differential drive technicians will:

Differential Drive & Transfer Case Inspection:

• Visually inspect the externals of the gear case
• Check for abnormal conditions through out the gearbox
• Check shaft endplays using dial indicators
• Check the bevel gears backlash
• Check tooth contact patterns
• Check oil pockets for free flow of oil
• Verify lube line locations
• Verify oil pump gear alignment
• Check PIV coupling disc packs
• Recommend required repairs for future outages
• Recommend spare and replacement parts
• Inspect the condition of existing spares

CC Roll & Yankee Dryer Gear Box Rebuild:

• Visually inspect the externals of the gear case
• Inspect gears for tooth damage and proper bore fits
• Replace all bearings and seals
• Repair worn seal surfaces
• Clean oil spray pipes and passages
• Test unit for good gear tooth contact patterns
• Gear set replacement