K1-20 Dual Indicator Concentricity Gage
Two configurable measurement positions for medium-size cylindrical components.
The Universal Punch K1-20 is a dual-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 K1 architecture combines a Standard Carrier with a Side Carrier, allowing two configurable indicator contact positions around the same supported rotating component.
The -20 dual-indicator gage with Standard + Side Carrier access.
K1 identifies Universal Punch's dual-indicator architecture using a Standard Carrier plus Side Carrier. -20 identifies the 3/8–2 in / 10–50 mm component class.
The K1-20 is designed for inspections where two probe positions are useful around one supported rotational setup, and where the second measurement location benefits from lateral Side Carrier access.
Two indicators are useful because they provide two different measurement-access positions.
The defining benefit of K1-20 is not simply the presence of two indicators. It is the combination of Standard Carrier access plus lateral Side Carrier access around the same rotating component.
Standard Carrier
Provides the primary configurable measurement position. Contact location, stylus direction, indicator range and resolution should be selected from the drawing and inspection plan.
Side Carrier
Provides the lateral access that defines the K1 architecture. Use the Side Carrier when the second inspection feature is better reached from the side of the supported component.
The primary configurable measurement position.
The Standard Carrier supports the first indicator position around the rotating component. It should be configured from the actual inspection feature—not copied from a catalog photograph.
Lateral indicator access is what separates K1 from K2.
The second indicator position on the K1-20 is mounted using a Side Carrier. This provides lateral access to a feature that may not be most conveniently reached from the primary carrier position.
Because K1-20 and K2-20 share the same published -20 component envelope, the correct model is determined by measurement access and carrier architecture, not diameter and length alone.
Medium -20 capacity with two measurement positions.
| Specification | K1-20 Published Data |
|---|---|
| Model | K1-20 |
| Gage Type | Dual Indicator Concentricity Gage |
| Carrier Configuration | Standard Carrier + Side Carrier |
| Part Diameter | 3/8–2 in / 10–50 mm |
| Published Part-Length Range | Approximately 0.18–6 in / 4.7–152 mm |
| Overall Gage Length | 12.5 in / 318 mm |
| Gage Width | 6.5 in / 165 mm |
| Approximate Height | 6 in / 152 mm |
| Shipping Weight | 14.8 lb / 6.8 kg |
Stable dual-indicator inspection begins with the correct support geometry.
Both indicator positions reference the same supported rotational setup, which makes the component support geometry fundamental to the inspection.
Current 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 geometries may be appropriate depending on the part.
Support. Position. Rotate. Observe.
The -20 class supports Universal Punch's highest published accuracy option.
Universal Punch publishes Standard Black and Precision Gold classifications and states that its Concentricity Gaging Systems are calibrated and directly traceable to N.I.S.T.
K1-20 belongs to the -20 model class for which Universal Punch publishes Precision Gold eligibility. Confirm the final gage, indicator and calibration configuration when quoting.
Configure each measurement position independently.
Two measurement positions do not necessarily require identical indicator geometry. Each can be selected around the feature, access, range and resolution required at that location.
Choose the rotational method around the inspection workflow.
Manual Rotation
Universal Punch documentation describes a manual timing-belt pulley architecture for controlled rotational inspection.
Roller support, top contact, rotation and both indicator positions together form the complete K1-20 measurement setup.
K1-20 Variable Speed Motor Assembly
Universal Punch publishes 277-20 as the K1-20 Variable Speed Motor Assembly with a published 17 in / 432 mm base plate.
Published motor-drive documentation identifies the system as 24 VDC · 0–10 rpm · variable speed · forward/reverse. Transformer and industrial foot-switch options are also documented.
Ask About Motorizing the K1-20 →The second carrier position is the key selection decision.
K1-20 vs. K2-20
| Feature | K1-20 | K2-20 |
|---|---|---|
| Indicator Positions | 2 | 2 |
| 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 |
| Second Carrier | Side Carrier | Vertical Carrier |
K1-20 vs. G1-20
Dual Indicator
Standard Carrier + Side Carrier
Two configurable measurement positions around the same supported component.
Side Checker
Side Carrier architecture
Choose when a single Side Carrier measurement position is sufficient.
View G1-20 →K1-20 vs. KK1-20
2 Measurement Positions
Standard Carrier + Side Carrier.
Choose when two indicator positions satisfy the inspection plan.
3 Measurement Positions
Standard Carrier + Side Carrier + Side Carrier.
Choose when the inspection requires an additional lateral measurement position.
View KK1-20 →K1-Series Capacity Progression
| Model | Part Diameter | Maximum Part Length | Architecture |
|---|---|---|---|
| K1-10 | 1/8–1 in / 3–25 mm | 4 in / 102 mm | Standard + Side Carrier |
| K1-20 | 3/8–2 in / 10–50 mm | 6 in / 152 mm | Standard + Side Carrier |
| K1-40 | 3/4–4 in / 20–102 mm | 8 in / 203 mm | Standard + Side Carrier |
Configure K1-20 in three engineering decisions.
Universal Punch's Concentricity Gaging System is a configurable inspection platform: choose the gage architecture, choose the component support, then configure the measurement hardware.
Common engineering questions about the K1-20.
What is the Universal Punch K1-20?
The Universal Punch K1-20 is a dual-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 a Standard Carrier with a Side Carrier so two configurable measurement positions can be arranged around the same supported rotating component.
Why does the K1-20 use two indicators?
The K1-20 provides two configurable indicator contact positions around the same rotational setup. The first uses the Standard Carrier and the second uses the Side Carrier. The actual characteristics being inspected depend on the drawing, datum relationship, contact locations and inspection method.
What is the difference between K1-20 and K2-20?
Both are dual-indicator -20 gages. K1-20 uses a Standard Carrier plus a Side Carrier, while K2-20 uses a Standard Carrier plus a Vertical Carrier. Choose the architecture based on where the second indicator must reach the component.
What size parts can the K1-20 inspect?
The published K1-20 capacity is 3/8–2 in (10–50 mm) in diameter with part lengths up to 6 in (152 mm).
What are the published K1-20 overall dimensions?
Published general data for the K1/K2-20 platform 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 K1-20 weigh?
The published K1-20 shipping weight is 14.8 lb (6.8 kg).
What main roller configurations are available for the K1-20?
Universal Punch publishes Full Plain, Half Plain and Quarter Plain main roller configurations for the -20 model class. The correct support geometry should be selected from the actual usable cylindrical support surfaces on the component.
What is the standard -20 top roller?
Universal Punch parts documentation identifies 170-20, approximately 3/4 × 9/32 in (19 × 7 mm), as the standard -20 top roller.
Can K1-20 use Precision Gold?
K1-20 is a -20 model, and Universal Punch publishes Precision Gold eligibility for applicable -10 and -20 model classes. Confirm the exact ordered configuration, indicators, calibration and documentation requirements when quoting.
Is the K1-20 NIST traceable?
Universal Punch documentation states that its Concentricity Gaging Systems are calibrated and directly traceable to N.I.S.T. Confirm the required calibration certificate and documentation for the ordered configuration.
Can the K1-20 be motorized?
Yes. Universal Punch publishes Part No. 277-20 as the K1-20 Variable Speed Motor Assembly, with a published 17 in (432 mm) base plate. Confirm the current electrical package and accessories when quoting.
What does the K1-20 measure?
The K1-20 does not inherently define two fixed measurement characteristics. The measured characteristics are determined by the two indicator contact locations, component drawing, datum structure and inspection procedure.
What information should I send Universal Punch for a K1-20 quote?
Send the component drawing, part diameter and length, usable support journals, the two desired measurement locations, tolerance or inspection objective, indicator preferences, calibration requirements and whether manual or motorized rotation is preferred.
Send the drawing and both measurement locations.
Universal Punch can use the actual component geometry and inspection requirement to help determine the appropriate K1-20 support rollers, Standard Carrier position, Side Carrier position, indicators, calibration requirements and manual or powered rotational configuration.
- part drawing or CAD print
- maximum part diameter
- overall part length
- usable support journals
- support-land widths
- shoulders and flanges
- threads, splines and grooves
- measurement location 1
- measurement location 2
- datum relationship
- tolerance / required resolution
- manual or motorized preference
Compare K2-20, G1-20, and KK1-20 when selecting carrier access and number of measurement positions.