ISO/TS 19858:2024

Forestry machines - Portable chain-saws - Test method for evaluating saw chain lubricity

This document defines test procedures for classifying the lubrication ability of saw chain lubricant when using guide bar and saw chain.

Machines forestières — Tronçonneuses portables — Méthode d'essai pour l'évaluation de la capacité de lubrification de la chaîne de la scie

General Information

• Status: Published
• Publication Date: 25-Jan-2024
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: ISO/TC 23/SC 17 - Manually portable (hand-held) powered lawn and garden equipment and forest machinery
• Drafting Committee: ISO/TC 23/SC 17 - Manually portable (hand-held) powered lawn and garden equipment and forest machinery
• Current Stage: 6060 - International Standard published
• Start Date: 26-Jan-2024
• Due Date: 01-Nov-2024
• Completion Date: 26-Jan-2024

Relations

• Revises: ISO/TS 19858:2015 - Forestry machines - Portable chain-saws - Test method for evaluating saw chain oil lubricity
• Effective Date: 05-Nov-2022

Overview

ISO/TS 19858:2024 - "Forestry machines - Portable chain-saws - Test method for evaluating saw chain lubricity" defines a laboratory test method to classify the lubrication ability of saw chain lubricants when used with a guide bar and saw chain. The Technical Specification reproduces stress conditions experienced during sawing to assess lubricant performance in reducing friction and wear between chain and guide bar. The procedure is intended for reproducible comparison of lubricants and for inclusion of lubricant recommendations in manufacturers’ documentation.

Key Topics and Requirements

• Test rig and components
  • Loading wheel diameter: 185 ± 3 mm
  • Oil pump precision: ±0.1 ml/min
  • Cutting attachment: guide bar 400 ± 10 mm length, pitch 9.525 mm (0.375"), groove width 1.3 mm, bar nose radius 32 ± 1 mm
  • Chain: 60 drive links, pitch 9.525 mm, chain without teeth and bumpers
• Environmental condition
  • Ambient temperature: 20 ± 5 °C
• Test sequence and parameters
  • Run-in: 10 min
  • Long duration: 180 min
  • Chain preload: 20 N
  • Contact load: 80 ± 5 N
  • Lubricant flow: 50 ± 5 ml/min
  • Chain speed: 2 ± 0.2 m/s
  • Temperature sampling rate: minimum 6 readings per minute
• Measurements
  • Chain elongation measured on three non-overlapping sectors (minimum 26 rivets per sector); tension during measurement: 50 ± 2 N
  • Guide bar wear measured with dial indicator ±0.01 mm using a 4 mm ball head to quantify depth loss
  • Surface temperature measured at a defined point with thermometer accuracy ±3 °C
  • Clean guide bar and chain with ultrasonic cleaner before testing and before measurements
• Guidance values (for comparison, not mandatory pass/fail)
  • Overall chain elongation: < 2 mm
  • Guide bar wear depth: < 1.5 mm
  • Surface temperature over 180 min: < 85 °C

Applications and Users

ISO/TS 19858:2024 is directly useful for:

• Lubricant manufacturers developing and marketing saw chain lubricants (including biodegradable products)
• Chainsaw and guide bar OEMs specifying recommended lubricants in owner manuals
• Independent testing laboratories performing comparative lubricity tests
• Procurement specialists and forestry operators evaluating lubricant performance for maintenance and safety programs

This test method provides consistent, repeatable data on saw chain lubricity, guide bar wear, chain elongation, and operating temperature to inform product selection and maintenance decisions.

Related Standards

• ISO 2049 - Petroleum products: determination of colour (ASTM scale)
• ISO 2909 - Petroleum products: viscosity index calculation (used for lubricant reporting)

Keywords: ISO/TS 19858:2024, saw chain lubricity, chain-saw lubricant test, guide bar wear, chain elongation, forestry machines, portable chain-saws, lubricant testing.

Standards Content (Sample)

Technical
Specification
ISO/TS 19858
Second edition
Forestry machines — Portable
2024-01
chain-saws — Test method for
evaluating saw chain lubricity
Machines forestières — Tronçonneuses portables — Méthode
d'essai pour l'évaluation de la capacité de lubrification de la
chaîne de la scie
Reference number
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test rig . 1
4.1 General .1
4.2 Major components .1
5 Test procedure . 2
5.1 Ambient temperature .2
5.2 Test parameters .3
5.3 Chain elongation after the run-in period .3
5.4 Chain elongation and wear of the guide bar after the long duration test .3
6 Measurements . 3
6.1 Chain elongation .3
6.2 Guide bar wear.4
6.3 Temperature .5
7 Information to be reported . 5
8 Results . . 6

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and
forestry, Subcommittee SC 17, Manually portable (hand-held) powered lawn and garden equipment and forest
machinery.
This second edition cancels and replaces the first edition (ISO/TS 19858:2015), which has been technically
revised.
The main changes are as follows:
— specifying a sampling rate for temperature measurement;
— adaptation of the cutting set to products available on the market;
— adaptation of the measuring distance;
...