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What is the difference between reamers H7, H8, and H9?

1 Answers

VonBrady

07/30/25 7:17am

The main difference between reamers H7, H8, and H9 lies in their precision levels, with H7 being the most precise. A reamer is a rotary cutting tool with one or more teeth used to remove a thin layer of metal from the surface of a machined hole. It is a finishing tool with straight or helical blades, employed for enlarging or refining holes. Below is an introduction to automotive maintenance: 1. Introduction to automotive maintenance: Automotive maintenance refers to the periodic inspection, cleaning, replenishment, lubrication, adjustment, or replacement of certain parts as a preventive measure, also known as vehicle upkeep. 2. Scope of automotive maintenance: Modern automotive maintenance primarily includes the engine system, transmission system, air conditioning system, cooling system, fuel system, power steering system, among others. 3. Purpose of automotive maintenance: The goal of automotive maintenance is to maintain a clean vehicle appearance, ensure normal technical conditions, eliminate potential hazards, prevent faults, slow down the deterioration process, and extend the service life.

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