Choose KK1-20 when the part fits the -20 envelope, three positions are required, and both additional measurements need Side Carrier access.
Universal Punch Concentricity Gaging System
KK1 Series · -20
Triple Indicator · Standard + Two Side Carriers
KK1-20 Triple Indicator Concentricity Gage
Three configurable measurement positions around one supported rotational setup.
The Universal Punch KK1-20 is a triple-indicator concentricity gage for cylindrical components from 3/8–2 in (10–50 mm) in diameter and up to 6 in (152 mm) long.
Its defining architecture combines one Standard Carrier with two independently configurable Side Carriers, providing three indicator positions around the same supported rotating component.
Choose KK1-20 when the component fits the -20 capacity class and the inspection requires three total measurement positions with lateral Side Carrier access for both additional indicators.
Technical page last updated:
September 1, 2026.
Confirm current production configuration when quoting.
KK1-20 Definition
The -20 triple-indicator gage with two Side Carrier positions.
KK1 identifies Universal Punch's triple-indicator architecture using one Standard Carrier plus two Side Carriers.
-20 identifies the Universal Punch component class for 3/8–2 in / 10–50 mm cylindrical parts.
KK1-20 provides three configurable indicator positions
around one supported rotational setup:
one Standard Carrier measurement position plus
two independent Side Carrier measurement positions.
Application Decision Guide
Is KK1-20 the right concentricity gage for your application?
Start with part capacity, then determine how many measurement positions are required and whether the additional probe positions need Side or Vertical access.
Choose K1-20 when only two indicator positions are required and one Side Carrier is sufficient.
Choose K2-20 when two positions are required and the second measurement needs Vertical Carrier access.
Choose KK2-20 when three positions are required but the third measurement needs Vertical rather than Side access.
Triple-Indicator Architecture
Three measurement positions. One supported rotational setup.
KK1-20 combines one Standard Carrier measurement position with two independently configurable Side Carrier positions.
Measurement Position 1
Standard Carrier
Establishes the primary configurable indicator position around the supported component.
Measurement Position 2
Side Carrier A
Provides the first independent lateral-access measurement position.
Measurement Position 3
Side Carrier B
Provides the second independent lateral-access measurement position that distinguishes KK1 from K1.
KK1-20 should be selected because the inspection requires three accessible measurement positions—not simply because three indicators are desirable.
Standard Carrier
Configure the primary measurement position from the print.
The Standard Carrier establishes the first KK1-20 indicator position. Final configuration should be determined from the actual component drawing, datum structure and inspection objective.
Inspection feature
Identify the diameter, journal, face, shoulder or other feature being evaluated.
Datum relationship
Define what the first indicator response represents relative to the supported rotational axis.
Probe clearance
Account for shoulders, grooves, threads, splines and nearby geometry.
Indicator selection
Choose range, resolution, stylus and contact direction from the actual tolerance.
Configuration principle:
KK1-20 product photography shows example indicator locations.
Final positioning should come from the component drawing and measurement requirement.
Two Side Carriers
Two Side Carriers define the KK1 architecture.
KK1-20 adds two independently configurable Side Carrier positions around the supported component, providing two additional lateral-access measurement locations beyond the Standard Carrier.
Choose KK1-20 when both additional measurement locations require Side Carrier access.
Choose KK2-20 when one of those additional positions instead requires Vertical Carrier access.
KK1-20 and KK2-20 share the same -20 size envelope and both provide three measurement positions. The distinguishing factor is the access geometry of the third position.
Published KK1-20 General Data
KK1-20 specifications and capacity.
Use the published -20 capacity for initial model selection, then configure support geometry and all three measurement positions from the actual component.
Part Diameter
3/8–2 in
10–50 mm
Part Length
Up to 6 in
152 mm
Carrier Architecture
Standard + 2 Side
Triple indicator
Overall Length
12.5 in
318 mm
Width / Approx. Height
6.5 in / 6 in
165 mm / 152 mm
Shipping Weight
14.8 lb
6.8 kg
| Specification | KK1-20 Published Data |
|---|---|
| Model | KK1-20 |
| Gage Type | Triple Indicator Concentricity Gage |
| Carrier Configuration | Standard Carrier + Two Side Carriers |
| Published Part Diameter | .37–2 in / 10–50 mm |
| Customer-Facing Nominal Diameter | 3/8–2 in |
| Published Part Length | .18–6 in / 4.7–152 mm |
| Customer-Facing Maximum Part Length | 6 in / 152 mm |
| Overall Gage Length | 12.5 in / 318 mm |
| Gage Width | 6.5 in / 165 mm |
| Approximate Height | 6 in / 152 mm |
| Published Shipping Weight | 14.8 lb / 6.8 kg |
-20 Roller Selection
Select the support geometry before configuring three indicator positions.
All three KK1-20 indicators reference the same supported rotational setup. Stable support therefore remains fundamental to the complete inspection system.
120-20FP · Full Plain
Full plain main roller set for suitable -20 cylindrical support geometry.
120-20HP · Half Plain
Half plain support where shoulders or adjacent features require more clearance.
120-20QP · Quarter Plain
Quarter plain support for narrower or more constrained cylindrical support lands.
Engineering rule:
the correct KK1-20 roller configuration is determined by the actual cylindrical support surfaces
on the component—not simply by the gage's maximum 2-inch diameter capacity.
Evaluate support journal diameter, support-land width, shoulders, flanges, grooves, threads, splines, diameter transitions, distance between support lands, unsupported span, component stiffness and all three indicator measurement locations.
Published -20 top roller reference:
Universal Punch documentation identifies 170-20,
approximately 3/4 × 9/32 in (19 × 7 mm),
as the standard -20 top roller.
Other published -20 top-contact configurations should be selected from the actual component geometry.
How KK1-20 Is Configured
Support one component. Configure three measurement positions.
01
Confirm the -20 capacity.
Verify component diameter, length and usable support geometry.
02
Select the -20 roller system.
Configure the main rollers and top contact from the actual support lands.
03
Configure the Standard Carrier.
Position the first indicator around the primary inspection feature.
04
Configure Side Carrier A.
Position the first additional lateral-access indicator.
05
Configure Side Carrier B.
Position the second independent lateral-access indicator.
06
Rotate the supported component.
Use controlled rotation through the required inspection cycle.
07
Interpret all three responses.
Apply the relevant feature, datum relationship, tolerance and inspection method to each indicator.
All three KK1-20 indicators reference the same supported rotational setup,
while each indicator can be configured for a different feature or contact location.
Accuracy & Calibration
KK1-20 falls within the applicable -20 Precision Gold model class.
Current Universal Punch documentation identifies Precision Gold for applicable -10 and -20 models. KK1-20 is a -20 model and therefore falls within the published eligible model classes.
Standard Black
Published system classification of better than or equal to 4 µm / 0.00016 in.
Precision Gold
Published for applicable -10 and -20 models at better than or equal to 2 µm / 0.000079 in.
N.I.S.T. Traceability
Specify the calibration certificate and documentation required for the exact ordered KK1-20 configuration.
Final measurement performance depends on the exact gage configuration, support geometry, indicator selection, inspection method and calibration documentation.
Indicator Configuration
Configure all three measurement positions independently.
KK1-20 does not assign fixed roles to its three indicators. Each position should be configured around its required feature, range, resolution, stylus and access.
Indicator 1 · Standard Carrier
Define primary contact position, range, resolution, stylus reach and contact direction.
Indicator 2 · Side Carrier A
Define the first lateral-access contact position and clearance requirement.
Indicator 3 · Side Carrier B
Define the second independent lateral-access position and its indicator geometry.
Manual & Motorized Rotation
Select rotational control around the inspection workflow.
Standard Architecture
Manual Rotation
Universal Punch literature describes a manual timing-belt pulley system for smooth, controlled rotational inspection.
Main rollers, top contact, rotation and all three carrier positions work together as one complete KK1-20 inspection configuration.
Optional · Part No. 279-20
KK1-20 Variable Speed Motor Assembly
Universal Punch publishes 279-20 as the KK1-20 Variable Speed Motor Assembly with a published 17 in / 432 mm base plate.
Current variable-speed drive documentation identifies a 24 VDC · 0–10 rpm · variable-speed · forward/reverse architecture. Confirm transformer, foot-switch and current electrical accessories when quoting.
Ask About Motorizing the KK1-20 →Model Selection
Choose the -20 architecture from the number and direction of measurement positions.
KK1-20 vs. K1-20
KK1-20
3 Indicators
Standard Carrier + Two Side Carriers
Choose when two additional lateral-access measurement positions are required.
K1-20
2 Indicators
Standard Carrier + Side Carrier
Choose when one additional Side Carrier measurement position is sufficient.
View K1-20 →KK1-20 vs. KK2-20
| Feature | KK1-20 | KK2-20 |
|---|---|---|
| Indicator Positions | 3 | 3 |
| Part Diameter | 3/8–2 in / 10–50 mm | 3/8–2 in / 10–50 mm |
| Maximum Part Length | 6 in / 152 mm | 6 in / 152 mm |
| Primary Carrier | Standard | Standard |
| Additional Position 1 | Side Carrier | Side Carrier |
| Additional Position 2 | Side Carrier | Vertical Carrier |
| Published Shipping Weight | 14.8 lb / 6.8 kg | 14.8 lb / 6.8 kg |
KK1-20 and KK2-20 have the same -20 component envelope and both provide three measurement positions.
Choose KK1-20 when both additional positions need Side Carrier access.
Choose KK2-20 when one additional position needs Side Carrier access and the other needs Vertical Carrier access.
KK1-20 vs. K2-20
KK1-20
Triple Indicator
Standard + Side + Side
Three total positions with two additional lateral-access locations.
K2-20
Dual Indicator
Standard + Vertical
Two total positions with vertical access for the second measurement.
View K2-20 →KK1-Series Capacity Progression
| Model | Part Diameter | Maximum Part Length | Architecture |
|---|---|---|---|
| KK1-10 | 1/8–1 in / 3–25 mm | 4 in / 102 mm | Standard + Two Side Carriers |
| KK1-20 | 3/8–2 in / 10–50 mm | 6 in / 152 mm | Standard + Two Side Carriers |
| KK1-40 | 3/4–4 in / 20–102 mm | 8 in / 203 mm | Standard + Two Side Carriers |
KK1-Series definition:
KK1-10, KK1-20 and KK1-40 preserve the same
Standard Carrier + Two Side Carriers triple-indicator architecture while increasing component capacity.
Universal Punch System Selection
Configure the complete KK1-20 system from the application.
The KK1-20 is a configurable inspection system. Final application depends on support geometry, three measurement positions, indicator configuration, accuracy and calibration requirements, and rotational method.
1 · Confirm KK1-20
Verify -20 capacity and the requirement for Standard + Two Side Carriers.
2 · Select support geometry
Choose the 120-20 series main rollers and appropriate top-contact geometry.
3 · Configure Indicator 1
Set the Standard Carrier measurement position from the primary inspection feature.
4 · Configure Indicator 2
Set the first Side Carrier position around the first additional lateral-access feature.
5 · Configure Indicator 3
Set the second Side Carrier position independently around the third measurement feature.
6 · Define accuracy & rotation
Select Standard Black or applicable Precision Gold, calibration documentation, and manual or 279-20 motorized rotation.
KK1-20 Technical FAQ
Common engineering questions about the KK1-20.
What is the Universal Punch KK1-20?
The Universal Punch KK1-20 is a triple-indicator concentricity gage for cylindrical components from 3/8–2 in (10–50 mm) in diameter and up to 6 in (152 mm) long. It combines one Standard Carrier with two independently configurable Side Carriers, providing three measurement positions around one supported rotational setup.
What does KK1-20 mean?
KK1 identifies the Universal Punch triple-indicator architecture using one Standard Carrier plus two Side Carriers. The -20 suffix identifies the 3/8–2 in (10–50 mm) component class.
How many indicators does the KK1-20 use?
KK1-20 is a triple-indicator gage. It provides one Standard Carrier measurement position and two additional Side Carrier measurement positions.
What size parts can the KK1-20 inspect?
The customer-facing KK1-20 capacity is 3/8–2 in (10–50 mm) in diameter with part lengths up to 6 in (152 mm). Published general data also lists approximately 0.18–6 in (4.7–152 mm) part length.
What are the published overall dimensions of the KK1-20?
Published KK1/KK2-20 general data lists approximately 12.5 in (318 mm) overall length, 6.5 in (165 mm) width and approximately 6 in (152 mm) height.
How much does the KK1-20 weigh?
The published KK1-20 shipping weight is 14.8 lb (6.8 kg).
What is the difference between KK1-20 and K1-20?
K1-20 uses two indicator positions with Standard plus Side Carrier architecture. KK1-20 adds a second independently configurable Side Carrier, creating three total measurement positions.
What is the difference between KK1-20 and KK2-20?
Both are -20 triple-indicator gages with the same published component envelope. KK1-20 uses Standard plus Side plus Side Carrier architecture, while KK2-20 uses Standard plus Side plus Vertical Carrier architecture. Choose between them from the access direction required for the third measurement position.
What is the difference between KK1-20 and K2-20?
K2-20 is a dual-indicator gage using Standard plus Vertical Carrier architecture. KK1-20 is a triple-indicator gage using Standard plus two Side Carriers. The difference is both the number of measurement positions and their access geometry.
What main roller configurations are published for KK1-20?
Universal Punch publishes Full Plain 120-20FP, Half Plain 120-20HP and Quarter Plain 120-20QP main roller configurations for the -20 model class. Final support geometry should be selected from the actual usable cylindrical support lands.
What is the standard -20 top roller?
Universal Punch documentation identifies 170-20, approximately 3/4 × 9/32 in (19 × 7 mm), as the standard -20 top roller. Other -20 top-contact sizes are also published.
Is Precision Gold available for KK1-20?
Current Universal Punch documentation identifies Precision Gold for applicable -10 and -20 model classes. KK1-20 is a -20 model and therefore falls within the published eligible model classes. Confirm the exact ordered accuracy configuration when quoting.
What accuracy does Universal Punch publish for KK1-20?
Universal Punch publishes Standard Black at better than or equal to 4 µm (0.00016 in) and Precision Gold at better than or equal to 2 µm (0.000079 in) for applicable -10 and -20 models. Confirm final performance and calibration documentation for the ordered KK1-20 configuration.
Is KK1-20 NIST traceable?
Universal Punch documentation states that its Concentricity Gaging Systems are calibrated and directly traceable to N.I.S.T. Confirm the calibration certificate and documentation required for the ordered configuration.
Can the KK1-20 be motorized?
Yes. Universal Punch publishes Part No. 279-20 as the KK1-20 Variable Speed Motor Assembly with a published 17 in (432 mm) base plate. Confirm current electrical accessories and options when quoting.
What does a triple-indicator KK1-20 actually measure?
The three indicators do not correspond to three fixed measurement characteristics. Each can be configured for a different feature or contact location depending on the component drawing, support geometry, datum structure, tolerance and inspection method.
What information should I send Universal Punch for a KK1-20 quote?
Send the component drawing, maximum diameter and length, usable cylindrical support journals, support-land widths, shoulders, flanges, threads, splines or grooves, all three intended measurement locations, required Side Carrier access, datum relationships, tolerances, indicator resolution, calibration requirements and manual or motorized preference.
Configure the KK1-20 Around Your Part
Send the drawing and all three measurement locations.
Universal Punch can review the component geometry and inspection requirement to help determine KK1-20 support geometry, Standard Carrier position, both Side Carrier positions, indicators, calibration documentation and rotational configuration.
- component drawing or CAD print
- maximum part diameter
- overall part length
- usable cylindrical support journals
- support-land widths
- shoulders and flanges
- threads, splines and grooves
- measurement location #1
- measurement location #2
- measurement location #3
- required Side Carrier access
- datum relationships
- inspection tolerances
- indicator resolution
- calibration requirements
- manual or motorized preference
- production inspection volume
Request a KK1-20 Quote →
Explore Concentricity Gages
Compare K1-20, K2-20, KK2-20, and KK1-40 when selecting measurement count, access direction and component capacity.