Description
Overview:
This genuine Makita Switch Unit (OEM No. 632A83-4) is a direct replacement assembly for selected SDS‐Max rotary hammers, including the HR4003C and HR4013C. Built with a durable plastic body and robust internal contacts, it restores dependable power switching and control to heavy‐duty demolition and drilling tools used on site and in the workshop. The unit is designed to withstand vibration, dust, and repeated trigger cycles typical of rotary hammer operation, helping maintain consistent tool performance. Supplied as a complete switch unit, it is intended for replacing worn, intermittent, or failed switches to keep your hammer working safely and efficiently. As a genuine Makita part, it matches the original specification for fit and function across the supported models, including HR5212C.
Key Features:
- Genuine Makita OEM switch unit, MPN 632A83-4
- Direct-fit replacement for compatible rotary hammers with no modification
- Durable construction with vibration- and dust-resistant design
- Restores reliable on/off control and consistent electrical performance
- Helps prevent intermittent running, arcing, and non-start faults
- Supplied as a complete unit for straightforward replacement and minimal downtime
- Suitable for professional site use and frequent operation
- Supports long-term tool maintenance and service schedules
Typical Applications:
Used to replace a faulty or worn switch in SDS‐Max rotary hammers working on concrete breaking, heavy drilling, anchor setting, and chiselling tasks. Ideal for restoring dependable trigger response on tools used in construction, demolition, civil engineering, plant hire, and maintenance environments where reliability and safety are essential.
Also known as:
Trigger switch, on/off trigger, switch assembly, control switch, electrical switch module, trigger pack, power switch module, start/stop switch, handle switch unit, replacement switch assembly.
Fits Models:
HR4003C, HR4013C, HR5212C
Alternate Part Numbers:
632A83 4, 632A834
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