Repair, Keyless Drill Chuck | Makita BHP453 specification

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Repair

CAUTION: Remove the battery and the bit from the machine for safety before repair/ maintenance!

[1] NECESSARY REPAIRING TOOLS

Description	Use for
Hex wrench 8	Removing /mounting Keylss drill chuck

Plastic hammer	Removing Keyless drill chuck

[2] LUBRICATION

It is not required to lubricate the gear section. Use Makita genuine Gear assembly that is factory-lubricated when repairing.

[3]DISASSEMBLY/ASSEMBLY

[3]-1. Keyless Drill Chuck

DISASSEMBLING

Note: (1) It is required to remove Keyless drill chuck at first when replacing Gear ass’y.

When parts other than Gear ass’y are related to repair, removing Keyless drill chuck is not required.

(2)If it is impossible to remove Keyless drill chuck in the following manner, use 1R359 (Chuck removing tool) to remove it. Refer to Makita repair tool list.

1)Open the jaws of Keyless drill chuck fully, and remove M6x22 - Flat head screw (left-handed and threadlocker coated) by turning clockwise using cordless impact driver in Forward rotation mode with slotted bit.

2)Fix the short leg of a hex wrench 8 in Keyless drill chuck, then clamp the long leg of the Hex wrench 8 securely in vise.

3)Set Action mode change lever of the machine in Drill mode, Speed change lever in Low speed, and F/R change lever in Reverse rotation mode.

4)Install Battery and hold the machine securely with both hands, then remove Keyless drill chuck from Gear ass’y by pulling Switch trigger slowly

to minimize the impact of kickback. (Fig. 1)

Important:

The machine rotates in the direction of the arrow with very strong force at the moment when Switch trigger is pulled.

Therefore, be careful not to pinch your hand or finger between the machine and the vise.

ASSEMBLING

Fig. 1

Note: Clamp the flats of Hex wrench 8 securely in vise.

1)Turn Keyless drill chuck clockwise until it sits on the end of the threaded portion of spindle of Gear ass’y.

2)Hold the short leg of Hex wrench 8 with Keyless drill chuck, and fix the long leg of Hex wrench 8 in vise. Install Battery. Then set Action mode change lever of machine in Drill mode, Speed change lever in Low speed, and F/R change lever in Forward rotation mode.

3)Slowly pull the switch trigger to rotate spindle until the motor is locked. Important: Be sure to release the switch trigger just after Spindle is locked.

4)Secure Keyless drill chuck with M6x22 - Flat head screw by turning counterclockwise using cordless impact driver with slotted bit.

Note: If you reuse the removed M6x22 - Flat head screw, apply threadlocker (ThreeBond 1321B/ 1342 or Loctite 242) to the threaded portion.

BHP453 specifications

The Makita BHP453 is a versatile and powerful cordless hammer drill that has become a favorite among both professional contractors and DIY enthusiasts. This tool is designed to deliver exceptional performance in a wide variety of applications, making it a reliable choice for tasks ranging from drilling holes to driving screws.

At the heart of the BHP453 is a robust 18-volt lithium-ion battery, which provides ample power for demanding jobs. The lithium-ion technology not only ensures longer run times but also reduces the memory effect, allowing users to recharge the battery at any time without worrying about diminishing performance. This is particularly beneficial for professionals who require efficient and uninterrupted operation on the job site.

One of the standout features of the Makita BHP453 is its 2-speed gear mechanism. This allows users to choose between a high-speed mode for drilling into wood and a lower-speed mode for more controlled drilling in tougher materials like masonry. The variable speed trigger offers further control, enabling precise results whether working on delicate projects or heavier tasks. Additionally, the drill can produce up to 1,700 revolutions per minute (RPM) and up to 22,000 beats per minute (BPM) for hammer drilling, providing impressive power.

The BHP453 is equipped with a 1/2-inch keyless chuck, which allows for quick and easy bit changes without the need for additional tools. This feature enhances productivity by minimizing downtime during bit swaps. Its compact design, weighing in at just around 4.0 pounds, ensures that the tool is comfortable to handle, even during prolonged use, reducing user fatigue.

Another significant technological advantage of the Makita BHP453 is its built-in LED work light. This light illuminates dark workspaces, providing visibility and enhancing safety while working in tight or poorly lit areas. The rubberized grip further enhances comfort, providing a secure hold that improves control and stability during operation.

The Makita BHP453 hammer drill is engineered with durability in mind. Its all-metal gear construction ensures a long service life and reliable performance under tough conditions. In summary, the Makita BHP453 is a powerful, user-friendly hammer drill that stands out for its battery technology, versatile drilling capabilities, and practical features, making it an excellent addition to any toolbox.