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TECHNICAL INFORMATION
Subject Changes of Flat Washer 49, Guide Ring , etc.
62067
(Page 1 of 13)
For Models HM1202, HM1202C, HM1242C
Country All countries
Description For improvement in durability, the following modifications have been implemented;
1. Cylinder and Parts Around Cylinder
1) Each thickness of Flat washer 49 and Guide ring has been changed.
2) Two O ring 38's have been added on Cylinder liner 44.
Accordingly, two grooves for the rings have been additionally engraved on Cylinder liner 44.
2. The Ball bearing on the armature's fan side has been changed for improved anti-dust construction.
3. The material of Urethane ring 43 has been changed for improved durability.
4. Tool Holder and Parts around Tool Holder
[ 2) to 5) are applicable only to HM1202 and HM1202C.]
1) Steel ball guide has been modified.
2) Impact bolt has been modified.
3) Ring spring 34 and Flat washer 37 has been replaced by new parts,
and Tool holder have been modified.
4) Chuck ring and Tool holder cover has been modified.
Compression spring 51 has been eliminated.
Sleeve 39 has been added.
1. Cylinder and Parts Around Cylinder Liner
(HM1202, HM1202C, HM1242C)
1-1) Change of Flat Washer 49 and Guide Ring
Guide ring
Current New
Flat washer 49
Flat Washer 49
Slide sleeve 49 Part No.344790-8 Part No.344998-4
Cylinder liner 44 t thickness (t): thickness (t):
1.0mm 2.0mm
[cross section]
Guide Ring
Part No.416927-8 Part No.417600-3
Compression spring 50 t thickness (t): thickness (t):
8.0mm 7.0mm
Crank housing [cross section]
1-2) Addition of O Ring 38 (2pcs.) and Modification of Cylinder Liner 44
Current New
Cylinder Liner 44 O Ring 38 (1pc.) Cylinder Liner 44 O Ring 38 (3pcs.)
one groove for O Ring 38 three grooves for O Ring 38
O Ring 38
1 pc. 3 pcs.
(Part No.213508-7)
Cylinder Liner 44 Part No.331554-9 Part No.331608-2
62067
(Page 2 of 13)
2. Change of Ball Bearing on the Armature's Fan Side
(HM1202, HM1202C, HM1242C)
Ball Bearing 6202DDW
Current New
Ball Bearing 6202DDW Ball Bearing 6202LLU
(Part No.211228-7) (Part No.211238-4)
Note:
It is impossible to distinguish the new part from the current one
by appearances.
Therefore, always control these items with their part numbers.
3. Change of the material of Urethane Ring 43
(HM1202, HM1202C, HM1242C)
Urethane ring 43 has been replaced by Urethane ring 41.
Barrel
Current New
Urethane ring 43 Urethane ring 43 Urethane ring 41
Tool holder (Part No. 262083-0) (Part No. 262095-3)
Color brown milky-white
Note: Its shape remains unchanged.
4. Tool Holder and Parts Around Tool Holder
4-1) Modification of Steel Ball Guide
(HM1202, HM1202C, HM1242C)
Chuck ring
Steel ball guide Current New
cross
12mm 18.5mm
section
Part No. 323876-1 324131-4
Change ring
4-2) Modification of Impact Bolt
(HM1202, HM1202C)
Current New
Tool holder
Impact bolt
96.0mm 100.0mm
Part No. 323908-4 324132-2
62067
(Page 3 of 13)
4-3) Modifications of Ring Spring 34, Flat Washer 37 and Tool Holder
(HM1202, HM1202C)
Tool holder Flat washer 37 Barrel
Ring spring 34
Change of Ring Spring 34
Ring spring 34 has been replaced by Rring spring 33.
Current New