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TECHNICAL INFORMATION
Subject Change of Commutator and Insulation Washer
54857

For Models HM1100, HM1100C
Country All countries
Description Commutator of Armature Assembly has been changed for further improvement of its durability.
Insulation Washer has been changed consequently.
1) Change of Commutator
Current New
1.2 mm 2.4 mm
(1/16") (3/32")

220V-240V

14 mm 12mm
(9/16") (15/32")
1.3 mm 2.4 mm
(1/16") (3/32")

115V

14 mm 12mm
(9/16") (15/32")

2) Change of Insulation Washer

Current New

13.7 mm 11.7 mm
(9/16") (15/32")

Interchangeability(I/C)
Item No. Current part Q'ty I/C New part Q'ty Note
Armature Assembly 220/240V Armature Assembly 220/240V For HM1100
056 1 Yes 1 220V~240V
510028-5 510028-5
countries
Armature Assembly 115V Armature Assembly 115V For HM1100C
056 1 Yes 1
516286-1 516286-1 115V countries
Armature Assembly 220/240V Armature Assembly 220/240V For HM1100C
056 1 Yes 1 220V~240V
516288-7 516288-7
countries
Insulation Washer Insulation Washer
055 1 No 1 For HM1100
681643-3 681651-4
Insulation Washer Insulation Washer
055 1 No 1 For HM1100C
681637-8 681650-6

Note
The Part Nos. for Armature Assemblies remain the same.

Implementation
HM1100: From serial No. 5350E (Nov., 1997)
HM1100C: From serial No. 16976E (Oct., 1997)