The setting ring, also called setting ring gauge, is a reference instrument used for the setting, inspection and calibration of internal measuring instruments. In practice, it provides a known and stable internal diameter, useful for correctly setting the instrument before measurement and verifying that inspection starts from a reliable reference.
Setting rings are mainly used with 3-point internal micrometers and bore gauges, but more generally they are useful whenever it is necessary to check or confirm the correct setting of an internal diameter measuring instrument. Before starting the measurement on the component, the instrument is checked on the reference ring in order to verify the zero setting and work from a correct metrological reference.
From an operational point of view, the setting ring is particularly useful whenever it is important to reduce errors caused by incorrect initial instrument adjustment. For this reason it is widely used in workshops and metrology rooms, especially for repetitive inspections, serial dimensional control and all applications where fast confirmation of the reference before measurement is required.
An important aspect is that the setting ring is not only used to “set zero”, but also for periodic inspection of the instrument. In many applications it is used to verify over time the behaviour of bore gauges and internal micrometers, providing practical confirmation of measurement consistency before use on the component.
These setting rings comply with DIN 2250-C and are available in a wide standard range from Ø 3 mm to Ø 300 mm. Special diameters on request are also available.
From a manufacturing point of view, a setting ring must provide a reliable geometric reference, because its function is precisely to transfer a known diameter value to the measuring instrument for setting or inspection purposes. For this reason it is particularly suitable whenever internal diameter inspections require continuity, reference consistency and practicality in everyday use.
In practical applications, setting rings are also very useful whenever several instruments are used within the same dimensional range or when frequent inspections are repeated during the working day. Having a dedicated reference allows faster zero resetting and helps organise the inspection routine more efficiently.
In summary, the DIN 2250-C setting ring is a highly effective solution for users working with internal measuring instruments and requiring a practical, stable reference suitable both for zero setting and periodic calibration of measuring instruments.
Applications
- Setting of 3-point internal micrometers
- Inspection and calibration of bore gauges
- Verification of reference on internal diameter measuring instruments
- Repetitive dimensional inspections in workshops
- Use in metrology rooms and quality control
- Periodic verification of correct instrument zero setting
FAQ – Setting ring
What is a setting ring?
It is a dimensional reference with a known internal diameter, used for setting or correctly checking the zero setting of internal measuring instruments.
What is a setting ring used for?
It is used to set, inspect and calibrate instruments such as 3-point internal micrometers and bore gauges, allowing work from a reliable reference before measurement on the component.
When are setting rings used?
They are used before measurements, during periodic instrument inspections and whenever it is important to verify the correct starting reference.
Is a setting ring only used for zero setting?
No, besides zero setting it is also useful for monitoring instrument behaviour over time and confirming correct adjustment.
Which instruments are most commonly used with setting rings?
They are mainly used with 3-point internal micrometers and bore gauges, but can also be used with other compatible internal diameter measuring instruments.
Why are setting rings useful in everyday inspection?
Because they allow fast verification of the instrument reference before measurement, making inspections more organised and consistent.
Do setting rings comply with a standard?
Yes, this series complies with DIN 2250-C.
Which diameters are available in the standard range?
The standard range covers diameters from 3 mm to 300 mm.
Are special diameters available on request?
Yes, besides the standard range, special diameters are also available on request.
In which environments are setting rings most commonly used?
They are widely used in mechanical workshops, quality control departments and metrology rooms, especially wherever frequent internal diameter inspections are performed.
Who is a setting ring intended for?
It is intended for users working with internal measuring instruments and requiring a practical and reliable reference for setting and inspection.
Can the setting ring be supplied with a calibration report or ACCREDIA certificate?
Yes, on request the setting ring can be supplied with a calibration report or ACCREDIA certificate. In the ACCREDIA-certified version, the ring can be used as a primary reference for internal calibration of bore gauges, 3-point internal micrometers and other internal measuring instruments.
What are the most common mistakes when using a setting ring?
The most common mistakes are using a dirty ring, performing the setting operation with a dirty instrument or failing to verify correct instrument positioning during inspection.
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