Universal Punch Concentricity Gaging System

Concentricity Gages & Rotational Inspection Systems

Compare Universal Punch systems by inspection application, part diameter, length, carrier arrangement, support geometry, indicator positions and rotation method.

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Manufacturer guidance: model capacity is only the starting point. Final rollers, support locations, measurement access and indicator or Lazer configuration must be selected from the part and inspection requirement.

Universal Punch A-10 concentricity gage configuration

Basic

Universal Punch KK2-20 concentricity gage configuration

Triple indicator

Universal Punch LGM-20 concentricity gage configuration

Motorized Lazer

-10 / -20 / -40Common diameter classes across multiple architectures

Up to 24 inPublished part length in extended HL shaft configurations

≤4 μmPublished Standard Black system classification

≤2 μmPublished Precision Gold class for applicable -10 and -20 configurations

Start here

Find the right starting model without learning the catalog first.

Use the known-model search when you already have a part number. Otherwise, describe the application and the selector will narrow the complete directory. Results are starting recommendations; engineering confirmation remains part of final configuration.

I know the model

Go directly to it.

Enter a model such as A-10, G2-20, KK2-40 or LGM-20.

Model number or family

Help me choose

Start with the inspection.

Select what you need the gage to do. Leave any uncertain field set to “Not sure.”

Inspection application

Part diameter class

Measurement positions

Rotation method

Capacity does not confirm support suitability. Submit the part drawing so usable support lands, feature access, rollers and datum structure can be reviewed.

Family comparison

Choose the architecture before the size.

Several models share the same diameter envelope while using different carriers, indicator positions and inspection layouts. Start with the job the gage must perform.

View the complete technical family comparison

Family	Best starting use	Carrier / measurement architecture	Positions
A Series	Compact general rotational inspection	Standard	1
B Series	General cylindrical rotational inspection	Standard	1
E Series	Eccentric or offset-journal checking	Vertical roller	1
F Series	Fastener recess inspection	Recess checking	1
G1 Series	Measurement access from the side	Side	1
G2 Series	Measurement access from above or vertically	Vertical	1
H Series	Long cylindrical parts up to 12 inches	Vertical	1
HL Series	Extended cylindrical parts up to 24 inches	Vertical	1
J Series	Low-profile, surface-plate and comparator setups	Comparator configuration	1
K1 Series	Two measurement positions with lateral access	Standard + Side	2
K2 Series	Two measurement positions with vertical access	Standard + Vertical	2
KK1 Series	Three measurement positions with two lateral positions	Standard + Two Side	3
KK2 Series	Three measurement positions with lateral and vertical access	Standard + Side + Vertical	3
LG Series	Steel-base Lazer measurement configuration	Lazer head	Lazer
LGM Series	Powered rotation with Lazer measurement architecture	Lazer head	Lazer

Complete model directory

Compare every model in one place.

Search by model, application, carrier arrangement, diameter, part length, indicator count or drive. Every model remains present in crawlable page content even when the interactive filters narrow the visible results.

Search model, family or application

40 models shown

Configuration sequence: choose the inspection architecture, confirm the size class, select main rollers and top contact, then define the indicator or Lazer system, accessories, accuracy documentation and rotation method.

No models match the current selections. Clear one or more filters, or send the component drawing for application review.

A Series

Basic Single Gage · Standard Carrier

Compact general rotational inspection. Final support and measurement geometry is application dependent.

A-10

-10

Basic Single Gage · Standard Carrier

Compact general rotational inspection

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 3 in
76 mm

StandardPositions: 1Manual

3/32 in capacity with Zero Style Rollers

B Series

Basic Extended Gage · Standard Carrier

General cylindrical rotational inspection. Final support and measurement geometry is application dependent.

B-10

-10

Basic Extended Gage · Standard Carrier

General cylindrical rotational inspection

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

StandardPositions: 1Manual

3/32 in capacity with Zero Style Rollers

B-20

-20

Basic Extended Gage · Standard Carrier

General cylindrical rotational inspection

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

StandardPositions: 1Manual

B-40

-40

Basic Extended Gage · Standard Carrier

General cylindrical rotational inspection

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

StandardPositions: 1Manual

E Series

Eccentric Roller Checker · Vertical Roller Carrier

Eccentric or offset-journal checking. Final support and measurement geometry is application dependent.

E-10

-10

Eccentric Roller Checker · Vertical Roller Carrier

Eccentric or offset-journal checking

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

Vertical rollerPositions: 1Manual

E-20

-20

Eccentric Roller Checker · Vertical Roller Carrier

Eccentric or offset-journal checking

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Vertical rollerPositions: 1Manual

E-40

-40

Eccentric Roller Checker · Vertical Roller Carrier

Eccentric or offset-journal checking

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

Vertical rollerPositions: 1Manual

F Series

Recess Fastener Checker · Recess Checking Carrier

Fastener recess inspection. Final support and measurement geometry is application dependent.

F-10

-10

Recess Fastener Checker · Recess Checking Carrier

Fastener recess inspection

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

Recess checkingPositions: 1Manual

F-20

-20

Recess Fastener Checker · Recess Checking Carrier

Fastener recess inspection

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Recess checkingPositions: 1Manual

G1 Series

Side Checker · Side Carrier

Measurement access from the side. Final support and measurement geometry is application dependent.

G1-10

-10

Side Checker · Side Carrier

Universal Punch G1-10 concentricity gage

Measurement access from the side

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

SidePositions: 1Manual

G1-20

-20

Side Checker · Side Carrier

Measurement access from the side

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

SidePositions: 1Manual

G1-40

-40

Side Checker · Side Carrier

Measurement access from the side

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

SidePositions: 1Manual

G2 Series

Side Checker · Vertical Carrier

Measurement access from above or vertically. Final support and measurement geometry is application dependent.

G2-10

-10

Side Checker · Vertical Carrier

Universal Punch G2-10 concentricity gage

Measurement access from above or vertically

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

VerticalPositions: 1Manual

G2-20

-20

Side Checker · Vertical Carrier

Measurement access from above or vertically

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

VerticalPositions: 1Manual

G2-40

-40

Side Checker · Vertical Carrier

Measurement access from above or vertically

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

VerticalPositions: 1Manual

H Series

Standard Shaft Gage · Vertical Carrier

Long cylindrical parts up to 12 inches. Final support and measurement geometry is application dependent.

H-10

-10

Standard Shaft Gage · Vertical Carrier

Long cylindrical parts up to 12 inches

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 12 in
305 mm

VerticalPositions: 1Manual

H-20

-20

Standard Shaft Gage · Vertical Carrier

Long cylindrical parts up to 12 inches

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 12 in
305 mm

VerticalPositions: 1Manual

H-40

-40

Standard Shaft Gage · Vertical Carrier

Long cylindrical parts up to 12 inches

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 12 in
305 mm

VerticalPositions: 1Manual

HL Series

Extended Shaft Gage · Vertical Carrier

Extended cylindrical parts up to 24 inches. Final support and measurement geometry is application dependent.

HL-10

-10

Extended Shaft Gage · Vertical Carrier

Extended cylindrical parts up to 24 inches

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 24 in
610 mm

VerticalPositions: 1Manual

HL-20

-20

Extended Shaft Gage · Vertical Carrier

Universal Punch HL-20 concentricity gage

Extended cylindrical parts up to 24 inches

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 24 in
610 mm

VerticalPositions: 1Manual

HL-40

-40

Extended Shaft Gage · Vertical Carrier

Universal Punch HL-40 concentricity gage

Extended cylindrical parts up to 24 inches

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 24 in
610 mm

VerticalPositions: 1Manual

J Series

Low Profile / Surface Plate / Comparator Gages

Low-profile, surface-plate and comparator setups. Final support and measurement geometry is application dependent.

JSLP-10 / JLP-10 / J-10

-10

Low Profile / Surface Plate / Comparator Gages

Low-profile, surface-plate and comparator setups

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

Comparator configurationPositions: 1Manual

J-20

-20

Low Profile / Surface Plate / Comparator Gages

Low-profile, surface-plate and comparator setups

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Comparator configurationPositions: 1Manual

J-40

-40

Low Profile / Surface Plate / Comparator Gages

Low-profile, surface-plate and comparator setups

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

Comparator configurationPositions: 1Manual

K1 Series

Dual Indicator · Standard + Side Carrier

Two measurement positions with lateral access. Final support and measurement geometry is application dependent.

K1-10

-10

Dual Indicator · Standard + Side Carrier

Two measurement positions with lateral access

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

Standard + SidePositions: 2Manual

K1-20

-20

Dual Indicator · Standard + Side Carrier

Universal Punch K1-20 concentricity gage

Two measurement positions with lateral access

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Standard + SidePositions: 2Manual

K1-40

-40

Dual Indicator · Standard + Side Carrier

Universal Punch K1-40 concentricity gage

Two measurement positions with lateral access

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

Standard + SidePositions: 2Manual

K2 Series

Dual Indicator · Standard + Vertical Carrier

Two measurement positions with vertical access. Final support and measurement geometry is application dependent.

K2-10

-10

Dual Indicator · Standard + Vertical Carrier

Two measurement positions with vertical access

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

Standard + VerticalPositions: 2Manual

K2-20

-20

Dual Indicator · Standard + Vertical Carrier

Universal Punch K2-20 concentricity gage

Two measurement positions with vertical access

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Standard + VerticalPositions: 2Manual

K2-40

-40

Dual Indicator · Standard + Vertical Carrier

Universal Punch K2-40 concentricity gage

Two measurement positions with vertical access

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

Standard + VerticalPositions: 2Manual

KK1 Series

Triple Indicator · Standard + Two Side Carriers

Three measurement positions with two lateral positions. Final support and measurement geometry is application dependent.

KK1-10

-10

Triple Indicator · Standard + Two Side Carriers

Three measurement positions with two lateral positions

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

Standard + Two SidePositions: 3Manual

KK1-20

-20

Triple Indicator · Standard + Two Side Carriers

Universal Punch KK1-20 concentricity gage

Three measurement positions with two lateral positions

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Standard + Two SidePositions: 3Manual

KK1-40

-40

Triple Indicator · Standard + Two Side Carriers

Three measurement positions with two lateral positions

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

Standard + Two SidePositions: 3Manual

KK2 Series

Triple Indicator · Standard + Side + Vertical

Three measurement positions with lateral and vertical access. Final support and measurement geometry is application dependent.

KK2-10

-10

Triple Indicator · Standard + Side + Vertical

Three measurement positions with lateral and vertical access

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 4 in
102 mm

Standard + Side + VerticalPositions: 3Manual

KK2-20

-20

Triple Indicator · Standard + Side + Vertical

Universal Punch KK2-20 concentricity gage

Three measurement positions with lateral and vertical access

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Standard + Side + VerticalPositions: 3Manual

KK2-40

-40

Triple Indicator · Standard + Side + Vertical

Universal Punch KK2-40 concentricity gage

Three measurement positions with lateral and vertical access

Part diameter3/4–4 in
20–102 mm

Part lengthUp to 8 in
203 mm

Standard + Side + VerticalPositions: 3Manual

LG Series

Lazer Gage · Steel Base

Steel-base Lazer measurement configuration. Final support and measurement geometry is application dependent.

LG-10

-10

Lazer Gage · Steel Base

Steel-base Lazer measurement configuration

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 6 in
152 mm

Lazer headPositions: LazerManual

Catalog identifies ≤2 μm accuracy

LG-20

-20

Lazer Gage · Steel Base

Universal Punch LG-20 concentricity gage

Steel-base Lazer measurement configuration

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Lazer headPositions: LazerManual

Catalog identifies ≤2 μm accuracy

LGM Series

Motorized Lazer Gage Configuration

Powered rotation with Lazer measurement architecture. Final support and measurement geometry is application dependent.

LGM-10

-10

Motorized Lazer Gage Configuration

Powered rotation with Lazer measurement architecture

Part diameter1/8–1 in
3–25 mm

Part lengthUp to 6 in
152 mm

Lazer headPositions: LazerMotorized

Motorized drive configuration

LGM-20

-20

Motorized Lazer Gage Configuration

Universal Punch LGM-20 concentricity gage

Powered rotation with Lazer measurement architecture

Part diameter3/8–2 in
10–50 mm

Part lengthUp to 6 in
152 mm

Lazer headPositions: LazerMotorized

Motorized drive configuration

Direct technical answer

What a concentricity gage actually does.

A Universal Punch concentricity gage supports a cylindrical component on controlled contact geometry, rotates the component and allows one or more indicators—or a configured Lazer system—to observe dimensional variation at selected features.

The measured variation is meaningful only in relation to the support condition, datum structure, probe direction, measurement location and inspection procedure. Diameter capacity alone does not establish the correct model or support geometry.

Plain-language definition

Concentricity gage: a precision rotational-inspection platform configured to support and rotate a cylindrical component while dimensional variation is observed at a defined feature.

SupportEstablish the intended rotational reference on selected component lands.

RotateTurn the supported component manually or with the specified drive method.

ObserveRead dimensional variation at the configured feature and probe direction.

What is TIR?

Total indicator reading is commonly the difference between the highest and lowest observed values through the specified rotation. Its interpretation depends on the setup and characteristic.

Is TIR the same as concentricity?

No. A variable indicator reading does not automatically prove the GD&T concentricity characteristic. The inspection method must match the drawing requirement.

Why do support lands matter?

The selected rollers establish the supported rotational reference. Shoulders, grooves, threads, transitions and insufficient land width can change support suitability.

Why use multiple indicators?

K and KK configurations provide two or three independently configurable contact positions. They do not permanently assign universal characteristics to those positions.

How to specify a system

Configure the system in four decisions.

Universal Punch selection documentation separates the gage model, main rollers, measurement equipment and accessories. A customer-facing workflow begins with the inspection architecture and part envelope.

Inspection architecture

Define the feature, datum relationship, probe access and number of measurement positions.

Part envelope

Confirm diameter, length, support-journal sizes, usable land widths and component stiffness.

Support geometry

Select main rollers and top contact around shoulders, threads, grooves and transitions.

Measurement and drive

Specify indicators or Lazer equipment, resolution, calibration documentation and rotation method.

Main rollers & top contact

Support geometry is part of the measurement system.

Choose roller geometry from the actual usable support surfaces—not nominal diameter alone. Preserve clearance around shoulders, threads, splines, grooves and the feature being inspected.

Full PlainBroad support geometry across published 110FP, 120FP and 140FP families.

Half PlainReduced-width support geometry across published 110HP, 120HP and 140HP families.

Quarter PlainNarrower support geometry across published 110QP, 120QP and 140QP families.

Zero StylePublished -10 configurations for very small diameters or difficult access conditions.

Top ContactTop-roller size and contact geometry must match the selected component support condition.

Special RollersApplication-specific geometry may be evaluated when standard rollers do not fit the part.

Accuracy, indicators & drive

Model size is only part of the specification.

Confirm the selected model’s current classification, indicator or Lazer equipment, calibration documentation and complete application setup during quotation.

Standard Black≤4 μm

Published system classification. Confirm the selected model and documentation requirement.

Precision Gold≤2 μm

Published for applicable -10 and -20 configurations. Do not assume eligibility for every model.

MeasurementIndicator / Lazer

Range, resolution, stylus or head position and output must match the inspection requirement.

RotationManual / Motorized

Selected standard models may be configured with a drive; LGM identifies a dedicated motorized Lazer family.

Engineering knowledge center

Answers that improve the inspection—not just the purchase.

These topics form the technical foundation for model selection, setup development and responsible interpretation of rotational measurement results.

Measurement fundamentals

Concentricity vs runout

Understand why a rotational indicator reading and the GD&T concentricity characteristic are not automatically interchangeable.

Reading interpretation

Understanding TIR

Relate maximum-to-minimum indicator movement to the specified datum, feature and inspection procedure.

Support geometry

Selecting roller contacts

Compare Full, Half, Quarter, Zero Style and application-specific support geometry.

Measurement access

Carrier arrangements

Use Standard, Side, Vertical and multi-carrier layouts to reach the required features.

Inspection workflow

Manual vs motorized rotation

Choose rotation based on component control, inspection volume and measurement process requirements.

Quality system

Calibration and traceability

Review Universal Punch quality and calibration support, then specify required documentation with the quotation.

Engineering FAQ

Common concentricity gage questions.

These direct answers support initial selection. Final configuration should be reviewed from the actual component and inspection requirement.

View technical downloads

What is a concentricity gage?

A concentricity gage supports a cylindrical component on controlled roller contacts and rotates the part while one or more indicators or a configured measurement system monitors dimensional variation. The setup and inspection method determine how the observed variation should be interpreted.

What does a concentricity gage measure?

It observes dimensional variation at a selected feature while the component rotates about the support condition established by the gage. The reading may support runout or concentricity-related inspection when the datum, contact locations and procedure match the drawing requirement.

Does the displayed reading automatically prove GD&T concentricity?

No. A variable indicator reading is not automatically equivalent to the GD&T concentricity characteristic. Interpretation depends on the datum structure, support geometry, measurement location, probe direction and approved inspection method.

What is TIR?

TIR commonly refers to total indicator reading: the difference between the highest and lowest observed indicator values through the specified rotation. Its meaning depends on the setup and characteristic being evaluated.

How do I choose the correct Universal Punch model?

Start with the inspection application and required measurement access. Then confirm part diameter, length, support surfaces, roller geometry, indicator positions, accuracy requirement and rotation method. Universal Punch can review the component drawing before the final configuration is specified.

What do -10, -20 and -40 mean?

They identify common diameter classes used across multiple Universal Punch families. -10 models commonly cover 1/8 to 1 inch, -20 models 3/8 to 2 inches and -40 models 3/4 to 4 inches. Exact length and architecture depend on the selected family.

What roller configurations are available?

Published main-roller families include Full Plain, Half Plain and Quarter Plain configurations. The -10 family also includes Zero Style options, and special roller geometry may be configured for difficult support surfaces.

What accuracy classifications are published?

Universal Punch documentation identifies Standard Black at 4 micrometers or better and Precision Gold at 2 micrometers or better for applicable -10 and -20 configurations. LG literature separately identifies a catalog accuracy statement. Confirm current model eligibility and calibration documentation when ordering.

Can a concentricity gage be motorized?

Manual rotation is used across standard configurations, while selected models can be configured with motorized drives. LGM identifies the dedicated motorized Lazer family. Rotation requirements should be confirmed during application review.

What should I submit for an application review?

Send the component drawing, diameter, length, usable support lands, feature being inspected, datum structure, measurement location, tolerance, desired indicator or Lazer configuration, rotation preference and calibration-documentation requirements.

Application review

Send the drawing before you guess.

Provide the component drawing, diameter, length, usable support lands, datum structure, feature location, tolerance, measurement positions, rotation preference and calibration-documentation requirements. Universal Punch can help identify the appropriate starting model and configuration.

Upload drawing & request a quote →Contact Universal Punch

Technical content should be reviewed against current production documentation before publication and whenever catalog or parts-list data changes.

Concentricity Gages & Rotational Inspection Systems

Find the right starting model without learning the catalog first.

Go directly to it.

Start with the inspection.

Choose the architecture before the size.

Single-position rotational inspection

Reach eccentric, recess, side or vertical features

Support shafts up to 12 or 24 inches

Low-profile and surface-plate configurations

Configure two or three measurement positions

Steel-base Lazer measurement architecture

Compare every model in one place.

A Series

A-10

B Series

B-10

B-20

B-40

E Series

E-10

E-20

E-40

F Series

F-10

F-20

G1 Series

G1-10

G1-20

G1-40

G2 Series

G2-10

G2-20

G2-40

H Series

H-10

H-20

H-40

HL Series

HL-10

HL-20

HL-40

J Series

JSLP-10 / JLP-10 / J-10

J-20

J-40

K1 Series

K1-10

K1-20

K1-40

K2 Series

K2-10

K2-20

K2-40

KK1 Series

KK1-10

KK1-20

KK1-40

KK2 Series

KK2-10

KK2-20

KK2-40

LG Series

LG-10

LG-20

LGM Series

LGM-10

LGM-20

What a concentricity gage actually does.

What is TIR?

Is TIR the same as concentricity?

Why do support lands matter?

Why use multiple indicators?

Configure the system in four decisions.

Inspection architecture

Part envelope

Support geometry

Measurement and drive

Support geometry is part of the measurement system.

Model size is only part of the specification.

Answers that improve the inspection—not just the purchase.