Cup Machine Maintenance: The 500 Hour and 2,000 Hour Schedule | yoco-group
---
title: "Cup Machine Maintenance: The 500 Hour and 2,000 Hour Schedule | yoco-group"
site: yoco-group.com
slug: cup-machine-maintenance-faq
canonical: https://yoco-group.com/geo/cup-machine-maintenance-faq.html
date: 2026-10-30
lang: en
description: "Planned maintenance intervals for a paper cup machine: daily checks, 500 hour bearing and heater service, 2,000 hour overhaul, and the four failures that cost the most downtime."
faq: 6
words: 612
---
A cup machine that runs 16 hours a day needs a daily check, a 500 hour service and a 2,000 hour overhaul, and the cost of skipping them shows up as unplanned downtime at 3 to 5 per cent of production rather than as a visible repair bill. The four failures that cause most of that downtime are heater drift, cam follower wear, bearing seizure on the main drive and a worn bottom cutter.
What belongs in the daily check?
Ten minutes at shift start: air pressure at 0.5 to 0.6 MPa, heater actual against set point within ±5 °C, seam roller condition, oil level in the lubricator, chip and dust on the curling die, cup count against the counter, and an audible check for a new knock. Record the heater reading and the air pressure, because the two numbers that drift first are also the two that produce silent quality loss rather than a stop.
What is the 500 hour service?
Grease the main cam and the follower tracks, check cam follower clearance against 0.05 mm, replace the lubricator element, inspect heater elements for resistance drift above 5 per cent, check belt tension and the timing of the transfer between stations, clean the air filter regulator, and verify the safety interlocks. Two to three hours with the machine stopped. A machine that reaches 1,500 hours without this service typically shows 0.2 to 0.4 mm of follower wear, which produces a 0.3 mm cup height variation that nobody attributes to the cam.
What does the 2,000 hour overhaul cover?
Replace all cam followers, both main bearings, the heater elements, the seam roller bearings, the bottom cutter if wear exceeds 0.1 mm, and the vacuum or air lines. Check the mandrel for ovality above 0.05 mm and the curling die for a worn profile radius. Eight to sixteen hours, best planned as a weekend. This is also when the machine geometry should be re-levelled and the frame checked for a cracked weld, which is a failure that appears on machines over eight years old and is invisible until it becomes a 40 mm misalignment.
What are the four most expensive failures?
Heater element drift, because it produces rejects rather than a stop and can run for a week at 3 per cent loss. Cam follower wear, because it changes cup dimensions gradually and the customer discovers it. Main bearing seizure, because it takes 24 to 72 hours to source and repair and stops the line. Bottom cutter wear, because it produces a burr that cuts the coating and creates a leak that only appears after filling. Three of the four are detectable by measurement during a planned service and invisible between services.
How should spares be stocked?
Consumables for one year: followers, heater elements, seam rollers, bearings, belts, and one bottom cutter set per size. That is typically 3 to 6 per cent of the machine price and it converts a 72 hour bearing wait into a 4 hour repair. The single most useful spare is a complete sealing station assembly, pre-set, so a failure becomes a swap rather than a rebuild during a production shift.
How is maintenance verified rather than assumed?
By recording the measurements, not the task. Follower clearance, heater resistance, cup height on five pieces, seam peel, and air pressure go on a sheet with a date and a name. A maintenance log that says "greased" has recorded an action; a log that says "follower clearance 0.04 mm, heater 412 °C" has recorded a condition, and only the second one predicts a failure.
Maintenance is the cheapest capacity a cup plant can buy. Every hour of planned service is worth roughly four hours of unplanned stop, and the arithmetic holds whether the plant runs one machine or twenty.