Hitachi CR 13VA service manual Optional Accessories

5-2. Optional Accessories

The cutting speed of the Model CR 13VA is substantially higher than that of the current model, however, the conventional HCS blades may be broken in heavy applications such as house demolition, etc. To cope with this problem, the BI-METAL blades shown in Table 2 are provided. The BI-METAL blades are tough and rarely break since they are made by electron-beam welding together of two different types of steels. A very hard steel called "DM05" (JIS: SKH51 or equivalent molybdenum containing high speed tool steel) or "Matrix II" (JIS: SKH59 or equivalent cobalt containing high speed tool steel) is used at the cutting edges, and a flexible steel for spring material is used for the blade main body. So these BI-METAL blades are remarkably stronger than the HCS blades.

(1) HCS blades

The blade numbers of HCS blades in Table 1 are engraved in the vicinity of the mounting position of each blade. Select appropriate blades by referring to Tables 1 and 3 below.

Table 1: HCS blades

Blade No.	Uses	Thickness (mm)
No. 1	For cutting steel pipes less than 105 mm in outer diameter	2.5 --- 6
No. 2	For cutting steel pipes less than 30 mm in outer diameter	2.5 --- 6
No. 3	For cutting steel pipes less than 30 mm in outer diameter	Below 3.5
No. 4	For cutting and roughing lumber	50 --- 70
No. 5	For cutting and roughing lumber	Below 30
No. 8	For cutting vinyl chloride pipes less than 105 mm in outer	2.5 --- 15
	diameter
	For cutting and roughing lumber	Below 105
No. 9	For cutting steel pipes less than 130 mm in outer diameter	2.5 --- 6
No. 95	For cutting steel and stainless pipes less than 105 mm in	Below 2.5
	outer diameter
No. 96	For cutting steel and stainless pipes less than 30 mm in	Below 2.5
	outer diameter

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