Construction of Low Vibration System Low Vibration Features Hitachi’s User Vibration Protection (UVP) system that reduces the vibrations from concrete drilling or chiselling with resonance occured by moving a weight in the opposite direction to the movement of the hammer. Reduction of vibration by approximately 33%*1 makes operations more comfortable. Lower Vibration Located on the side of the tool body for easy operation! Soft and easy to grip for comfortable operation! Large change lever Rotation Only For drilling in steel or wood, etc. (with optional drill chuck and chuck adapter) Double-molded side handle One-push action for quick bit mounting For drilling into concrete, etc. Hammering Only (3-mode models only) Chiselling of concrete or groove digging, etc. Angle adjustment function (3-mode models only) When using a cold chisel or cutter, the orientation of the tool tip can be adjusted by setting the change lever as shown on the left. High-durability hammering mechanism Increased Durability Approx. 2 times more Best-in-class drilling speed* & low vibration* 2 Powerful motors and optimized hammering achieved up to 30% faster drilling speed*3 to improve work efficiency. More Durable Extensive product range for various applications SDS-plus Shank Hammer drilling into concrete Vibration emission value ah, HD = 11.5m/s 2 Uncertainty K = 1.5 m/s2 Equivalent chiselling value Vibration emission value ah, HD = 11.5m/s 2 Uncertainty K = 1.5 m/s2 Vibration emission value ah, CHeq = 10.5m/s 2 Uncertainty K = 1.5 m/s2 Vibration emission value ah, HD = 14.8m/s 2 Uncertainty K = 1.5 m/s2 Vibration emission value ah, HD = 14.8m/s 2 Uncertainty K = 1.5 m/s2 Vibration emission value ah, CHeq = 11.1m/s 2 Uncertainty K = 1.5 m/s2 Vibration emission value ah, HD = 15.3m/s 2 Uncertainty K = 1.5 m/s2 Vibration emission value ah, HD = 15.3m/s 2 Uncertainty K = 1.5 m/s2 Vibration emission value ah, CHeq = 11.1m/s 2 Uncertainty K = 1.5 m/s2 Side Handle, Depth Gauge, Carrying Case Standard Accessories *1: In comparison with conventional models DH 24PC3 / DH 24PB3 *2: As of June 2013. Among 2kg class rotary hammers made by leading power tool manufacturers, surveyed by Hitachi Koki. *3: A comparison of the model DH 28PCY and the conventional model DH 24PC3. Mean value for drilling into concrete with drill bits between 8mm and 28mm diameters. The results may vary depending on operating conditions. *4: Weight: According to EPTA-Procedure 01/2003. *5: The tri-axial vibration values were measured according to EN60745-2-6. SDS-plus Shank Overall Length Weight (excluding cord)*4 Vibration Total Values Full-Load Impact Rate New internal pressure control mechanism A bit can be mounted by simply inserting it into the tool holder. No-Load Speed Ball bearings SDS-plus Shank Hammering mechanism features air channel system Power Input Provides smooth airflow in or out of the gear cover to stabilize and ensure hammering action. Faster Drilling Speed Ball bearing seals in grease and holds temperature low to protect melt down of gear cover. Faster Drilling Speed Up to 50% more volume of air cushion reduces wear and damage inside cylinder. Approximately 2 times longer life*1 achieved by reliable structure that includes a hammering mechanism same as Hitachi large hammers. 1 360° rotation allows more effective operation SDS-plus Shank SDS-plus Shank SDS-plus Shank