CB55 Rotary Knob AC Speed Controller

WHY THIS BOARD

Why choose CB55

The CB55 AC Motor Speed Control Board is designed for high-performance speed regulation of AC motor applications.

Supporting AC230V input voltage and 50-1500W power range, CB55 provides a wide-range motor speed control solution for professional power tools, industrial equipment, and motor-driven machinery.

With reliable electronic control technology and compact PCB integration, CB55 helps manufacturers develop products requiring adjustable speed control and stable motor operation.

AC speed regulation

Continuous motor speed control from the rotary dial — adjust cutting and sanding speed to the material.

Large rotary knob

Oversized dial for easy grip and precise speed adjustment — ideal for demanding workshop environments.

Easy installation

Straightforward wiring and mounting — plug and play integration into existing tool assemblies.

SPECIFICATIONS

CB55

Specification	Value
Model	CB55
Standard	—
Rated voltage	AC 230V
Rated current	—
Rated power	50~200W
Function	AC Speed Regulation · Large Rotary Knob · Easy Installation

PRODUCT VIEW

CB55 at a Glance

Board dimensions, dial and wiring from the catalog drawing.

BOARD

CB55 AC speed control board with large rotary knob for easy speed adjustment — 50~200W.

WIRING

Red, black and white leads for speed control and motor connection — wired to AC 230V.

USE

Fits AC-powered power tools — wire between the trigger switch and the motor.

APPLICATIONS

For AC-powered power tools

Official application range of the speed control board series.

01

AC-powered jigsaws

02

Circular saws

03

Reciprocating saws

04

Small bench drills

05

Table saws

06

Other handheld electric tools

TECHNICAL DRAWING

CB55 Dimensions & Wiring

Official engineering drawing from the catalog — click to enlarge.

PCB: 37 × 45.4 mm  ·  Thickness: 1.5 mm  ·  Knob: Φ30.5 mm  ·  Knob H: 13 mm  ·  Height: 27 mm  ·  Mounting: 2-Φ3.5

Wiring: Blue (18AWG) — Neutral input | Brown (18AWG) — Live input

Strip 5mm from wire end for terminal connection.

QUALITY & CERTIFICATIONS

Approved for global markets, checked at four gates

CB55 is built in our ISO 9001:2015 plant with UL- and TÜV-certified in-house laboratories, and every unit passes four quality gates before it ships.

TÜVcULusCEISO 9001:2015

IQC

Incoming quality control — materials and components are inspected on arrival.

IPQC

In-process quality control — automated assembly lines are checked at every station.

FQC

Final quality control — every unit is tested before shipment.

OQC

Outgoing quality control — packed batches are re-checked before dispatch.

Need a Custom Motor Control Solution?

Our engineering team can tailor a speed control PCB to your exact specifications. Get in touch for samples and pricing.

Contact Us

Frequently Asked Questions

What is the CB55?

The CB55 AC Motor Speed Control Board is designed for high-performance speed regulation of AC motor applications.

What are the key specifications of the CB55?

Model: CB55; Rated voltage: AC 230V; Rated power: 50~200W; Function: AC Speed Regulation · Large Rotary Knob · Easy Installation.

What should be checked before using the CB55 as a replacement?

Before using this product as a replacement, verify that rated voltage (AC 230V), rated power (50~200W) match your target part. Also check the mounting and terminal layout. Contact DKLD with the ratings of the part you are replacing and we will confirm suitability.

Can this product range be customized for OEM projects?

Yes. Electrical parameters, connectors and packaging can be customized for OEM/ODM projects.

How can I verify DKLD certifications?

UL certification and TÜV certification are verifiable in the official databases.

Where are DKLD products manufactured?

All products are manufactured at our Yueqing facility with in-house quality control.