Hitachi POWER TOOLS CR 13VA - Manual (Page 6)

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(5) Dust- and water-resistant triple-sealing construction
The Model CR 13VA has a triple-sealing construction to protect from the large amount of dust generated when
cutting construction materials, autoclaved lightweight concrete, etc. and also from waste water when cutting
pipes.
Dust-resistant felt ring (with backup ring)
It prevents dust from entering by way of the plunger (reciprocating shaft).
Dust- and water-resistant seal ring (made of heat-resistant rubber)
It prevents dust and waste water from entering by way of the plunger (reciprocating shaft).
Dust- and water-resistant seal sleeve (made of heat-resistant rubber)
It prevents dust and waste water from entering through the clearance of the gear case.
< Triple-sealing construction >
(6) Sturdy and heat-resistant thanks to the double-molded front cover (rubber and plastic)
Front covers made of rubber have been generally used for saber saws. However, such front covers are not so
durable and there is increasing demand for a sturdier saber saw. To cope with this demand, the Model
CR 13VA is equipped with a durable double-molded front cover that is composed of a glass-fiber reinforced
polycarbonate body and a nonskid rubber grip. In addition, heat resistance is improved by making a clearance
between the front cover and the gear case to flow cooling air for the motor.
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Felt ring
Backup ring contacted with the felt ring
Seal sleeve
Plunger
Seal ring