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CSA - C22.2 NO. 62841-4-1-20

Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery — Safety — Part 4-1: Particular requirements for chain saws

active, Most Current
Organization: CSA
Publication Date: 1 January 2020
Status: active
Page Count: 100
ICS Code (Electric tools): 25.140.20
scope:

This standard applies to chain saws for cutting wood and designed for use by one person. This standard does not cover chain saws designed for use in conjunction with a guide-plate and riving knife or in any other way such as with a support or as a stationary or transportable machine.

This standard does not apply to

- chain saws for tree service as defined in ISO 11681-2; or

- pole-mounted pruners.

NOTE 101 Pole-mounted pruners will be covered by a future part of IEC 62841.

NOTE 102 In Europe (EN 62841-4-1), this annex does not apply to chain saws equipped with integral batteries and with a maximum speed of the saw chain exceeding 5 m/s.

The chain saws covered by this standard are designed only to be operated with the right hand on the rear handle and the left hand on the front handle.

K.1DV DR Modification: Delete the first dashed item in Clause K.1 of the Part 4 (U.S. Only):

K.8.14.1.101 Safety instructions for chain saws

Replacement of item 1) c):

c) Hold the chain saw by insulated gripping surfaces only, because the saw chain may contact hidden wiring. Saw chains contacting a "live" wire may make exposed metal parts of the chain saw "live'" and could give the operator an electric shock.

K.8.14.1.101DV.1 D2 Modification: Replace Item e) of Clause 8.14.1.101 with the following:

e) Do not operate a chain saw, on a ladder, from a rooftop, or any unstable support. Operation of a chain saw in this manner could result in serious personal injury.

K.8.14.1.101DV.2 D2 Modification: Add Item nDV) to Clause K.8.14.1.101:

nDV) Do not operate a chain saw in a tree unless you have been specifically trained to do so. Operation of a chain saw in a tree without proper training could increase the risk of serious personal injury.

K.8.14.1.301 General chain saw safety warnings

a) Follow all instructions when clearing jammed material, storing or servicing the chain saw. Make sure the switch is off and the battery pack is removed. Unexpected actuation of the chain saw while clearing jammed material or servicing may result in serious personal injury.

NOTE 1 The above warning is used for machines with separable batteries or detachable batteries.

b) Follow all instructions when clearing jammed material, storing or servicing the chain saw. Make sure the switch is off and the lock-off is in the locked position. Unexpected actuation of the chain saw while clearing jammed material or servicing may result in serious personal injury.

NOTE 2 The above warning is used for machines with integral batteries.

K.8.14.2 b) Items 101) and 102) in Part 4-1 are not applicable.

Addition:

301) Instructions for the use and adjustment of any means of support for separable battery packs in accordance with K.21.301 and instructions for release or removal.

K.8.14.2 c) Addition:

301) For machines with integral batteries, instructions on how to disable the machine during maintenance or servicing.

K.8.14.3 If information about the mass or weight of the machine is provided, it shall be the mass of the machine without the saw chain, guide bar, guide bar cover, oil, battery (except for integral batteries) and optional accessories.

If information about the mass or weight of the battery(ies) is provided, it shall cover the range of specified batteries.

K.12.2.1 This subclause of Part 4-2 is not applicable.

K.14 Moisture resistance

This clause of Part 4-1 is not applicable, except as follows:

K.14.301 Battery-powered ichain saw moisture resistance

K.14.301.1 The enclosure of the machine shall provide the degree of protection against moisture in accordance with the classification of the machine. This does not apply to saw chain lubrication tanks and lubrication systems intended for use with oil as specified in 8.14.2.

Compliance is checked by the appropriate treatment specified in K.14.301.3, with the machine conditions as in K.14.301.2.

101.DVA.1.10 Modification: Apply Clause 19.103 of the Part 4 and add the following:

This requirement may also be fulfilled by other parts of the CHAIN SAW.

101.DVA.1.11 Modification: Apply Clause 19.107.1.1 of the Part 4 and replace the first paragraph with the following:

The release force shall be not more than 50 N and not less than 20 N for TOP HANDLE CHAIN SAWS.

101.DVA.1.12 Modification: Replace Clause 19.107.2 of the Part 4 with the following:

19.107.2 CHAIN SAWS shall be equipped with a NON-MANUALLY ACTIVATED CHAIN BRAKE that is sufficiently sensitive to operate when KICKBACK occurs.

Compliance is checked by inspection and by the test of ISO 13772, with the power switch in the ″ on ″ position and the CHAIN SAW fitted with the lightest and heaviest battery in accordance with Clause K.8.14.2 e) 2). The threshold level of CHAIN SAWS for tree service shall apply.

101.DVA.1.13 Modification: Apply Clause 19.107.4 of the Part 4 and replace the first paragraph with the following:

The computed KICKBACK angle or the chain stop angle, whichever is lower, shall be determined for the most unfavourable GUIDE BAR and saw chain combination specified in 8.14.2. The angle shall not exceed 25°.

The CHAIN BRAKE stopping time shall be measured by any test arrangement suitable to measure the time from the moment the simulated KICKBACK is detected by the NON-MANUALLY ACTIVATED CHAIN BRAKE until the saw chain has stopped.

101.DVA.1.14 Modification: Apply Clause K.19.111 of the Part 4 and replace the fourth and fifth paragraphs with the following:

The top handle CHAIN SAW shall be supported by a 10 mm diameter rod, positioned as close as possible behind the power switch. The rod shall be firmly attached to the rear handle by clamp or similar means so that the guide bar plane will be verticali. iThe rod shall be supported on bearings to produce the lowest possible friction to allow CHAIN SAW rotation.i See Figure 2 of ISO 8334:2007.

iFor top handle CHAIN SAWS, the angle ß between the centreline of the GUIDE BAR and the horizontal plane as shown in Figure 2 of ISO 8334:2007 shall not exceed ±25°.

101.DVA.1.15 Addition: Add Clause K.19.301DV to Annex K of the Part 4:

K.19.301DV Lateral (Sideways) Balance

TOP HANDLE CHAIN SAWS shall have lateral balance. During the test, the most unfavourable battery pack as specified in K.8.14.2 (e)(2) shall be installed in the tool.

Document History

January 1, 2020
Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery — Safety — Part 4-1: Particular requirements for chain saws
This standard applies to chain saws for cutting wood and designed for use by one person. This standard does not cover chain saws designed for use in conjunction with a guide-plate and riving knife or...
C22.2 NO. 62841-4-1-20
January 1, 2020
Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery — Safety — Part 4-1: Particular requirements for chain saws
This standard applies to chain saws for cutting wood and designed for use by one person. This standard does not cover chain saws designed for use in conjunction with a guide-plate and riving knife or...

References

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