Starrett DW933 Internal Micrometer, Range 50 mm →304 mm

brands

attributes.Features

attributes.Accuracy

attributes.Resolution

attributes.Imperial_or_Metric

attributes.Micrometer_Type

attributes.Calibrated_service_type

attributes.Set_Contents

attributes.Maximum_Measurement

attributes.Minimum_Measurement

Starrett DW934 Internal Micrometer, Range 50 mm →300 mm

Starrett DY092 External Micrometer, Range 0 →1 in

Starrett DY093 External Micrometer, Range 1 →2 in


A micrometer (sometimes called micrometer screw gauge) is a precision measuring instrument, used to obtain very fine measurements and available in metric and imperial versions. They use a calibrated screw or thread (found internally on the spindle) for precise measurement of components in mechanical engineering and machining as well as most mechanical trades. They usually come in the form of callipers e.g. opposing ends joined by a frame. Learn how to calibrate and use micrometers correctly in our comprehensive [micrometers guide](https://my.rs-online.com/web/generalDisplay.html?id=ideas-and-advice/micrometers-guide).

### What are Micrometers are composed of?

Here is a list of different components that make up a typical multimeter:

- Frame - The C-shaped body that holds the anvil and barrel in constant relation to each other,
- Anvil - The shiny part that the spindle moves toward, and that the sample rests against,
- Sleeve/barrel/stock - The stationary round component with the linear scale on it, sometimes with vernier markings,
- Locknut / lock-ring / thimble lock - The knurled component (or lever) that tightens to hold the spindle stationary,
- Spindle - The shiny cylindrical component that the thimble causes to move toward the anvil,
- Thimble - The component that turns by using a person's thumb. Graduated markings,
- Ratchet stop - Device on the end of the handle that limits applied pressure by slipping at a calibrated torque,
- Screw.

### How do they work?

The precision is determined by the thread pitch of the spindle. The spindle is a very accurately machined screw and the object to be measured is placed between the spindle and the anvil. The spindle is moved by turning the ratchet knob or thimble until the object to be measured is lightly touched by both the spindle and the anvil.

### Types of Micrometers
- Outside micrometer: most common type used to measure external dimensions such as the outside diameter of an object.
- Inside micrometer; used to measure inside dimensions like the inside diameter of a hole or tube. There are two types: calliper-type and tubular and rod.
- Depth micrometer: these are used to measure the depths of holes, slots and steps. They come with a variety of interchangeable rods of different lengths so that they can be used to measure a range of depths.

### Advantages
- Provide very accurate measurements and are considered one of the most accurate types of measuring device
- Ratchet speeder helps to provide reliable measurements
- Integrated scales, the sleeve scale and thimble scale are built into the tool, another measuring instrument such as a ruler or tape measure is not required
- Durability and long-lasting and unlikely to need replacing or repairing


Micrometers

Engineering Test & Measurement

Test & Measurement

Electrical, Automation & Cables

Automation & Control Gear

Automation Signalling

Contactors & Auxiliary Contacts

Electric Motors

Industrial Robots

PLCs, HMIs & Industrial Computing

Process Control

Sensors

Solenoids

Cables & Wires

AV Cables

Cable Glands & Fittings

Cable Joints & Cable Sleeving

Cable Management

Cable Ties & Fixings

Computer Cables

Electrical Power & Industrial Cables

Networking & Coaxial Cables

Single Core Cable

Wire to Board Cables & Ribbon Cable

Enclosures & Server Racks

19-Inch Racking

Enclosures

Enclosures & Racking Components

Fuses & Circuit Breakers

Circuit Breakers

Earth & Lightning Protection

Fuse Holders & Accessories

Fuses

Fuses - PCB

HVAC, Fans & Thermal Management

Air Conditioning & Fans

Air Conditioning & Heating Accessories

Building Automation

Electronics Heating & Cooling Components

Fan Accessories

Lighting

Light Bulbs, Lamps & Tubes

Light Fittings, Fixtures & Luminaires

Lighting Components

Torches & Inspection Lamps

Relays & Signal Conditioning

Relay Accessories

Relays

Signal Conditioners & Isolators

Switches

Capacitive, Magnetic and Piezo Switches

DIP & Rotary Encoded Switches

Domestic Installation Switches

Foot Switches & Components

Joysticks & Components

Key Switches & Selector Switches

Keyboard & Keypad Switches

Limit & Position Switches

Micro Switches & Detector Switches

Push Button Switches & Components

Rocker Switches & Components

Rope Pull Switches & Components

Rotary Switches & Components

Safety Enabling & Control Switches

Safety Interlock Switches & Components

Switch Disconnectors & Components

Toggle Switches & Slide Switches

Electronic Components, Power & Connectors

Batteries & Chargers

Battery & Charger Accessories

Battery Chargers & Power Banks

Non-Rechargeable Batteries

Rechargeable Batteries

Connectors

AV Connectors

Automotive Electrical Connectors

Backplane & Rack Connectors

Circular Connectors

IC Sockets & Adapters

Mains & DC Power Connectors

Network & Telecom Connectors

PCB Connectors & Wire Housings

Power Connectors

RF Coaxial Connectors & Adapters

Terminal Blocks

USB, D Sub & Computing Connectors

Wire Terminals & Splices

Displays & Optoelectronics

Display Modules

Fibre Optic Components

Indicators & Indicator Components

LED Lighting Components

LEDs - Light Emitting Diodes

Laser Modules & Components

Optocouplers & Photodetectors

ESD Control, Cleanroom & PCB Prototyping

ESD Control & Clean Room

PCB Etching, Preparation & Developing

PCB Handling

PCB Spacers, Pillars & Supports

PCB Tools

Prototyping Boards

Passive Components

Antennas

Capacitors

Crystals, Oscillators & Resonators

EMI Filters & Protection

Fixed Resistors

Inductors

Passive Components Kits

Rotary Encoders

Sounder, Buzzer & Microphone Components

Surge Protection Components

Variable Resistors

Power Supplies & Transformers

Power Supplies

Renewable Energy

Transformers

Voltage Converters

Raspberry Pi, Arduino, ROCK, STEM Education & Development Tools

Arduino Shop

BBC micro:bit Shop

Development Tools & Single Board Computers

ROCK SBC Shop

Raspberry Pi Shop

STEM Education

Semiconductors

Amplifiers & Comparators

Audio & Video ICs

Chip Programmers & Debuggers

Clock, Timing & Frequency ICs

Communication & Wireless Module ICs

Data Converters

Discrete Semiconductors

Display Drivers & Controllers

Interface ICs

Logic ICs

Memory Chips

Power Management ICs

Processors & Microcontrollers

Programmable Logic ICs

Sensor ICs

Mechanical, Fluid Power & Tools

Access, Storage & Material Handling

Ladders & Steps

Material Lifting & Loading Equipment

Storage & Shelving

Transit & Equipment Cases

Trucks, Trolleys & Lifting Tables

Adhesives, Sealants & Tapes

Adhesive, Sealant & Tape Dispensers

Adhesives & Glues

Sealants & Resins

Tapes

Bearings & Seals

Gaskets, Seals & Packings

Linear Motion

Rotary Bearings & Housing Units

Engineering Materials & Industrial Hardware

Anti Vibration & Levelling Components

Carbon Fibre & Felt Sheets

Castors & Wheels

Ceramic Materials

Channel Support Systems

Conveyor Components

Insulation Materials

Knobs, Levers & Handles

Metal Materials

Plastic & Rubber Materials

Polishing & Finishing

Shim Stock

Structural Systems

Fasteners & Fixings

Clips & Springs

Girder Fixings

Magnets & Magnetic Strips

Nails & Rivets

Nuts & Washers

Pins, Keys & Retaining Clips

Screws & Bolts

Sheet Metal & Panel Fasteners

Spacers & Standoffs

Wall Plugs, Fixings & Anchors

Hand Tools

Cable, Connector & Crimping Tools

Clamps & Vices

Starrett Micrometers

4 Products showing for Starrett Micrometers

Popular Searches

Related links