Standard + Side + Vertical
Choose KK2-20 when the -20 envelope applies and the inspection requires primary, lateral and vertical access.
KK2 Series · -20 Platform
Triple Indicator · Standard + Side + Vertical
KK2-20 Triple Indicator Concentricity Gage
Standard, lateral and vertical measurement access for cylindrical components from 3/8-2 in (10-50 mm) in diameter and up to 6 in (152 mm) long.
Part Diameter
3/8-2 in
10-50 mm
Part Length
Up to 6 in
152 mm
Indicator Positions
Three
One supported setup
Carrier Architecture
Standard + Side + Vertical
KK2 configuration
Direct Definition
Three carrier positions on the intermediate -20 platform.
The Universal Punch KK2-20 is a triple-indicator concentricity gage combining one Standard Carrier, one Side Carrier and one Vertical Carrier around the same component support system.
KK2 identifies the carrier relationship. -20 identifies the nominal 10-50 mm component-capacity class.
The defining KK2-20 capability is not simply three indicators. It is Standard, lateral and vertical measurement access within one supported rotational setup.
Model Selection
Is KK2-20 the right concentricity gage?
Start with component size, then choose the number and direction of indicator-access positions required by the inspection method.
Standard + Two Side
Choose KK1-20 when three positions are needed but both secondary indicators require Side Carrier access.
Standard + Vertical
Choose K2-20 when two positions are sufficient and no separate Side Carrier is required.
Standard + Side
Choose K1-20 when two positions are sufficient and no Vertical Carrier is required.
Triple-Indicator Architecture
Three access positions. One supported rotational setup.
Each indicator position is configured from the drawing, usable contact geometry, datum relationship and inspection objective.
Standard Carrier
The primary configurable indicator position for the component and inspection procedure.
Side Carrier
A separate lateral-access position that can address another feature or axial location.
Vertical Carrier
A differently oriented indicator position providing vertical measurement access.
The indicators do not represent three permanently assigned characteristics. What each position evaluates depends on the support surfaces, datum structure, contact point, indicator direction, tolerance and documented inspection method.
Position One
Configure the Standard Carrier from the component drawing.
The Standard Carrier establishes the primary indicator position. Final contact location should be based on the feature being evaluated and its relationship to the component support datums.
- Feature and datum relationship
- Probe direction and clearance
- Indicator range and resolution
- Stylus reach and contact geometry
- Shoulders, flanges and grooves
- Threads, splines and transitions
Positions Two and Three
Side and Vertical access define the KK2 architecture.
The Side Carrier provides a lateral-access indicator position. The Vertical Carrier provides a differently oriented position above the supported component.
This relationship distinguishes KK2-20 from KK1-20, which uses two Side Carriers instead of one Side Carrier and one Vertical Carrier.
Choose KK2-20 when one secondary measurement requires Side Carrier access and the other requires Vertical Carrier access. Choose KK1-20 when both secondary positions require Side Carrier access.
Published Technical Data
KK2-20 specifications
Published general dimensions are useful planning references. Indicator selection, carrier position and optional motorization can affect the operating envelope.
| Specification | KK2-20 | Technical note |
|---|---|---|
| Model | KK2-20 | Universal Punch KK2 Series |
| Type | Triple-Indicator Concentricity Gage | Three configurable indicator positions |
| Carrier architecture | Standard + Side + Vertical | Defining KK2 architecture |
| Part diameter | 3/8-2 in / 10-50 mm | Published -20 capacity |
| Published part-length range | Approximately 0.18-6 in / 4.7-152 mm | Customer-facing maximum: 6 in / 152 mm |
| Published gage length | 12.5 in / 318 mm | General-data reference |
| Published gage width | 6.5 in / 165 mm | General-data reference |
| Published gage height | Approximately 6 in / 152 mm | Confirm working clearance with selected indicators |
| Published shipping weight | 14.8 lb / 6.8 kg | Manufacturer catalog and general data |
| Accuracy classifications | Standard Black; eligible Precision Gold | Specify the required classification at quote |
| Optional motor assembly | 280-20 | 17 in / 432 mm base plate |
-20 Support System
Select main rollers from the component's usable support geometry.
Nominal diameter establishes the model class. It does not, by itself, establish the correct support configuration.
Full Plain
Full Plain main roller set for -20 concentricity gage models.
Half Plain
Half Plain main roller set for applications requiring different support-land access.
Quarter Plain
Quarter Plain main roller set for more restricted usable support geometry.
170-20 · 3/4 × 9/32 in
Approximately 19 × 7 mm. The current manufacturer parts list identifies 170-20 as the standard -20 top roller.
180-20 · 190-20 · 200-20 · 205-20
Other listed -20 top-contact sizes support different component contact and clearance requirements.
A component being within the two-inch KK2-20 capacity does not automatically determine the correct roller set. Support geometry must be selected from the actual component.
Inspection Process
How KK2-20 is configured and used
All three readings reference the same supported rotational setup, while each contact position can address a different inspection location.
Confirm capacity
Verify diameter, overall length and usable component support surfaces.
Select rollers
Choose the -20 support geometry from the actual component lands.
Set the Standard Carrier
Position the primary indicator from the drawing and datum structure.
Set the Side Carrier
Configure the lateral-access indicator for its required contact location.
Set the Vertical Carrier
Configure the vertically oriented indicator position and required clearance.
Rotate and interpret
Rotate the component and evaluate each reading against its applicable tolerance.
KK2-20 provides three indicator readings from one supported setup. Whether those readings represent runout, concentricity-related variation or another feature relationship depends on the support datums, contact positions and inspection procedure.
Accuracy and Traceability
Choose the accuracy classification required by the application.
KK2-20 is a -20 model and falls within the published eligibility range for both Standard Black and Precision Gold classifications.
≤4 µm0.00016 in
Published Standard Black accuracy classification. Confirm the selected indicators and calibration documentation during quotation.
≤2 µm0.000079 in
Precision Gold is published for -10 and -20 models. Specify this classification when requesting the KK2-20 configuration.
N.I.S.T. traceability
Universal Punch documentation states that its concentricity gaging systems are calibrated and directly traceable to N.I.S.T.
Configuration note: Precision Gold eligibility does not mean that every KK2-20 is automatically supplied as Precision Gold. Specify the required accuracy class, indicators and calibration documentation during quotation.
Optional Powered Rotation
Add controlled rotation with the 280-20 motor assembly.
The supplied product photography shows this optional drive. It should not be interpreted as standard equipment on every KK2-20.
280-20
KK2-20 variable-speed motor assembly.
17 in
432 mm published motorized base-plate length.
24 VDC
Published variable-speed drive system.
0-10 rpm
Variable speed with forward/reverse control.
Compare -20 Models
Select by indicator count and access direction.
| Model | Indicators | Carrier Architecture | Nominal Capacity | Selection Logic |
|---|---|---|---|---|
| G1-20 | 1 | Side | 3/8-2 in | One lateral-access position |
| G2-20 | 1 | Vertical | 3/8-2 in | One vertical-access position |
| K1-20 | 2 | Standard + Side | 3/8-2 in | Primary plus lateral access |
| K2-20 | 2 | Standard + Vertical | 3/8-2 in | Primary plus vertical access |
| KK1-20 | 3 | Standard + Two Side | 3/8-2 in | Primary plus two lateral positions |
| KK2-20 | 3 | Standard + Side + Vertical | 3/8-2 in | Primary, lateral and vertical access |
KK1-20 and KK2-20 both provide three indicator positions within the same -20 capacity. Choose KK1-20 for two Side Carriers. Choose KK2-20 for one Side Carrier and one Vertical Carrier.
KK2 Family
The same three-direction architecture across three capacity classes.
| Model | Part Diameter | Maximum Length | Architecture |
|---|---|---|---|
| KK2-10 | 1/8-1 in / 3-25 mm | 4 in / 102 mm | Standard + Side + Vertical |
| KK2-20 | 3/8-2 in / 10-50 mm | 6 in / 152 mm | Standard + Side + Vertical |
| KK2-40 | 3/4-4 in / 20-102 mm | 8 in / 203 mm | Standard + Side + Vertical |
The Universal Punch KK2 Series preserves the Standard + Side + Vertical Carrier relationship while increasing component capacity from KK2-10 through KK2-40.
Manufacturer Configuration
Configure the complete KK2-20 around the inspection requirement.
Select the gage
Confirm the -20 component envelope and KK2 carrier architecture.
Select the support
Choose -20 main rollers and top contact from the actual support lands.
Configure indicators
Define Standard, Side and Vertical contact locations, ranges, styli and mounts.
Define accuracy and rotation
Specify Standard Black or Precision Gold, calibration documentation and manual or powered rotation.
Technical RFQ Checklist
Let Universal Punch review the complete KK2-20 application.
A component drawing and clearly identified Standard, Side and Vertical measurement locations allow the system to be evaluated as a complete inspection configuration.
- Component drawing
- Diameter range and overall length
- Support-journal diameters
- Usable support-land widths
- Shoulders, flanges and transitions
- Threads, splines and grooves
- Standard Carrier measurement
- Side Carrier measurement
- Vertical Carrier measurement
- Datum relationships and tolerances
- Accuracy and calibration requirements
- Manual or motorized preference
Technical FAQ
KK2-20 questions and direct answers
What is the Universal Punch KK2-20?
The KK2-20 is a triple-indicator concentricity gage with one Standard Carrier, one Side Carrier and one Vertical Carrier. It supports nominal component diameters from 3/8 to 2 inches and component lengths up to 6 inches.
What does KK2-20 mean?
KK2 identifies the Standard Carrier plus Side Carrier plus Vertical Carrier triple-indicator architecture. The -20 suffix identifies the intermediate 10 to 50 millimeter component-capacity class.
What component sizes can the KK2-20 support?
The catalog range is 3/8 to 2 inches, or 10 to 50 millimeters, in diameter and up to 6 inches, or 152 millimeters, long. The current general-data table lists an approximate minimum part length of 0.18 inch or 4.7 millimeters.
Why does the KK2-20 have three indicators?
The three indicators provide Standard, Side and Vertical Carrier measurement positions around the same supported rotational setup. Their exact contact locations and purposes are defined by the component drawing and inspection method.
What is the difference between KK2-20 and KK1-20?
Both are triple-indicator models with the same nominal -20 capacity. KK1-20 uses a Standard Carrier and two Side Carriers. KK2-20 uses a Standard Carrier, one Side Carrier and one Vertical Carrier.
What is the difference between KK2-20 and K2-20?
K2-20 is a dual-indicator model with Standard and Vertical Carriers. KK2-20 adds a Side Carrier for a total of three indicator positions.
What is the difference between KK2-20 and K1-20?
K1-20 is a dual-indicator model with Standard and Side Carriers. KK2-20 adds a Vertical Carrier for a total of three indicator positions.
Which main roller sets are used with KK2-20?
Universal Punch lists 120-20FP Full Plain, 120-20HP Half Plain and 120-20QP Quarter Plain main roller sets for -20 gages. Roller selection should be based on the actual usable support geometry of the component.
What is the standard -20 top roller?
The current parts list identifies the 170-20 top roller, measuring 3/4 inch by 9/32 inch or approximately 19 by 7 millimeters, as the standard -20 top roller.
Is KK2-20 eligible for Precision Gold?
Yes. The current parts list publishes Precision Gold for -10 and -20 models. KK2-20 is therefore within the eligible model range. Specify Standard Black or Precision Gold and confirm the selected classification during quotation.
Is the KK2-20 traceable to N.I.S.T.?
Universal Punch documentation states that its concentricity gaging systems are calibrated and directly traceable to N.I.S.T.
Can the KK2-20 be motorized?
Yes. The current parts list identifies the 280-20 variable-speed motor assembly for KK2-20, including a 17-inch or 432-millimeter base plate. The published drive system is 24 VDC with a 0 to 10 rpm variable-speed range.
What do the three KK2-20 indicators measure?
The indicators do not have three permanently assigned characteristics. Each reading depends on the component supports, datum structure, contact location, probe direction, tolerance and documented inspection procedure.
Does the Vertical Carrier define a fixed measurement?
No. Vertical Carrier describes the indicator-access architecture and approach direction. The feature being evaluated still depends on the component drawing, support datums, contact location and inspection procedure.
Is a concentricity gage the same as a concentricity gauge?
Yes. Gage and gauge are alternate spellings used for the same general inspection-equipment category. Universal Punch uses the spelling gage in its product names and documentation.
What should I send for a KK2-20 quote?
Send the component drawing, diameter range, overall length, support-journal geometry, all three measurement locations, datum relationships, tolerances, indicator requirements, calibration requirements and manual or motorized preference.
KK2-20 Application Review
Start with the component, support geometry and all three measurement locations.
Universal Punch can review the complete requirement and help identify the appropriate gage, roller configuration, indicators, accuracy class, accessories and rotation method.