Large-diameter shaft concentricity and runout inspection with a 12-inch measurement envelope.
The Universal Punch H-40 is a Standard Shaft Concentricity Gage with a Vertical Carrier,
designed for larger cylindrical shafts and elongated components that require both the -40 diameter class and the extended H-series shaft envelope.
Universal Punch consistently publishes 3/4–4 in diameter with part lengths up to 12 in (305 mm); current model-selection documentation places H-40 in the 20–105 mm -40 group.
The H-40 combines the larger -40 diameter class with dedicated H/HL shaft-support architecture, allowing larger long cylindrical components to be supported while the indicator is positioned vertically over the required inspection feature.
H-40 · Standard Shaft Gage · Vertical Carrier. Universal Punch consistently publishes the H-40 as a 3/4–4 in shaft platform with part lengths up to 12 in / 305 mm.
Part Diameter3/4–4 inCurrent class: 20–105 mm
Part LengthUp to 12 in305 mm
ArchitectureStandard ShaftVertical Carrier
Shipping Weight11.2 lb5.1 kg
What Is the H-40?
A purpose-built concentricity gage for longer shafts.
The H-40 extends the Universal Punch -40 concentricity-gaging class specifically for longer cylindrical parts.
H identifies the Standard Shaft Gage architecture, while -40 identifies the
3/4–4 in diameter class; current model-selection documentation groups H-40 at 20–105 mm.
Where standard -40 Side Checker platforms such as G2-40 publish part lengths up to 8 in, the H-40 extends the shaft envelope to 12 in / 305 mm. It is selected when the application requires both larger -40 diameter capacity and the longer H-series support architecture.
H-40 long-shaft architecture. The extended shaft platform allows widely spaced support and measurement locations within the published 12 in part-length envelope.
Standard Shaft Architecture
Select the H-40 when diameter fits the -40 class but shaft length drives the application.
Long-shaft inspection is not only a question of nominal diameter. The support journals, distance between support locations,
shoulders, splines, grooves, threads, shaft stiffness, overhang and measurement feature all influence the final H-40 configuration.
01
Identify the inspection feature
Define the diameter, shoulder, journal or other rotational feature being evaluated and its datum relationship.
02
Identify support journals
Select stable cylindrical surfaces and confirm usable support widths around adjacent geometry.
03
Position the Vertical Carrier
Place the indicator above the required feature with appropriate stylus direction, range and clearance.
04
Control long-shaft support
Use H/HL roller and support accessories appropriate to journal spacing, overhang and the component drawing.
Selection principle: choose H-40 based on both diameter and shaft length—not diameter alone.
Published H-40 Capacity
The H-40 combines the large -40 diameter class with a 12-inch shaft envelope.
Model
H-40
Gage Type
Standard Shaft Gage
Carrier
Vertical Carrier
Part Diameter
3/4–4 in
Current Metric Selection Class
20–105 mm
Legacy Catalog Metric Reference
20–102 mm
Maximum Part Length
12 in / 305 mm
Shipping Weight
11.2 lb / 5.1 kg
Metric documentation note: Universal Punch source documents are consistent on the 3/4–4 in H-40 range. Legacy catalog literature uses 20–102 mm, while current model-selection documentation places H-40 in the 20–105 mm -40 class. Confirm current production capacity when quoting applications near the upper metric limit.
Vertical measurement access. Indicator style, stylus geometry and carrier position should be selected from the actual shaft drawing and measurement feature.
H / HL Shaft Roller System
Dedicated short rollers support the shaft-gaging architecture.
Current Universal Punch parts documentation separates the H and HL families from the general Full Plain / Half Plain / Quarter Plain roller listing and publishes dedicated Full Plain Short Roller Sets for H-10, H-20 and H-40.
H-10 Full Plain Short Set110-10HS · 0.6 in / 16 mm
H-20 Full Plain Short Set120-20HS · 0.8 in / 22 mm
H-40 Full Plain Short Set140-40HS · 1.0 in / 25 mm
H-40 dedicated shaft roller set
140-40HSFull Plain Short Roller Set · approx. 1.0 in / 25 mm roller length
Support geometry must come from the actual shaft.
The correct H-40 setup depends on journal width, shoulders, splines, grooves, threads, bearing surfaces,
distance between support points, shaft stiffness, overhang and the feature being inspected.
Support journal width
Shoulder clearance
Spline / groove location
Support-point spacing
Shaft stiffness
Inspection feature
Engineering principle: two shafts with the same diameter can require different support geometry. Select the roller and accessory system from the print, not the nominal diameter alone.
H-40 Short Roller140-40HSDedicated Full Plain Short Roller Set for the -40 H/HL shaft class.Current Standard -40 Top Roller230-401 × 5/16 in · 25 × 8 mm, identified as standard in current parts documentation.Long-Shaft SupportH / HL AccessoriesDedicated support, carrier, stop and end-support components are published for the shaft families.
Indicator Configuration
Configure the measurement system around the tolerance.
Universal Punch publishes a broad selection of analog and digital test indicators together with indicator mounts,
swivel supports and carrier attachments. The H-40 should therefore be configured around the actual inspection requirement rather than being locked into one indicator type.
H-40 shaft support and measurement detail. Long-shaft support, carrier position and indicator contact should be treated as one inspection system.
H & HL Accessories
The H-40 is a configurable shaft-inspection system, not simply a fixture.
Universal Punch publishes a dedicated H/HL accessory family for long-shaft applications. This expands the H-40 beyond its base frame and allows support and measurement access to be configured around actual component geometry.
Shaft Support
Support and end-control options
Published H/HL categories include support roller assemblies, wide end roller supports, end roller supports, fixed carbide Vee assemblies, stops and pusher components.
Measurement Access
Carrier and indicator options
Published H/HL categories include horizontal indicator carriers, front horizontal carriers, vertical indicator carriers, fine-adjustment attachments, vertical roller checker carriers and end dial-test-indicator carriers.
H-40-specific examples: current H/HL parts documentation includes Wide End Roller Support 426-40, End Roller Support 427-40, Fixed Carbide Vee Assembly 428-40, Front Part Pusher Assembly 443-40, and larger H-40 / HL-40 rod-stop and collar-stop components. A 12-inch shaft may require very different support spacing and measurement access than another shaft of the same diameter.
Published H-40 Accuracy
Standard Black ≤4 µm is the published classification applicable to the -40 H-40 platform.
Standard Black
Published H-40 accuracy class
≤4 µm0.00016 in published accuracy
Current Universal Punch parts documentation states that Concentricity Gaging System classifications are calibrated and directly traceable to NIST.
Precision Gold
Not published for -40 models
-10 / -20 onlyCurrent published eligibility
Current parts documentation limits Precision Gold ≤2 µm / 0.000079 in to -10 and -20 model classes. Because H-40 is a -40 model, this page does not represent Precision Gold as the standard published H-40 classification.
Manual Part Rotation
Smooth controlled shaft rotation is fundamental to rotational inspection.
Universal Punch documents a manual timing-belt pulley drive architecture that provides smooth part rotation during inspection.
The H/HL accessory list also publishes dedicated timing-belt sets for H and HL models.
As the supported shaft rotates, the indicator tracks variation at the selected measurement feature. Roller support, shaft loading, indicator contact and rotation method should all be treated as part of one measurement setup.
Standard conceptManual rotation
Drive architectureTiming-belt pulley
H / HL supportDedicated belt sets
Optional upgradeVariable-speed motor
Optional Powered Rotation
A dedicated H-40 variable-speed motor assembly is currently published.
Current Universal Punch parts documentation lists Part No. 274-40 — H-40 Variable Speed Motor Assembly
with a 17 in / 432 mm base plate. The current drive-system section identifies
24 VDC / 0–10 rpm operation with forward/reverse control and 110/220 VAC transformer support.
H-40 vs. G2-40: both serve the large -40 diameter class and use Vertical Carrier architecture. H-40 is the Standard Shaft platform with a 12 in maximum part length; G2-40 is the Side Checker platform with an 8 in maximum part length.
Standard Shaft
H-40
Up to 12 in / 305 mm long 11.2 lb / 5.1 kg published shipping weight
Extended Shaft
HL-40
Up to 24 in / 610 mm long 29.5 lb / 13.5 kg published shipping weight
H-40 vs. HL-40: choose H-40 for large shafts up to 12 in long; choose HL-40 when the same large shaft family requires the extended 24 in inspection envelope.
H Standard Shaft Family
One 12-inch shaft architecture across three diameter classes.
Universal Punch documents the H-40 as part of a complete modular concentricity gaging system.
Universal Punch documentation defines the Concentricity Gaging System around three choices: select the gage model, select the main rollers, and select the indicator(s) / accessories.
For an H-40 application, that means selecting the large -40 Standard Shaft platform, configuring the dedicated H/HL shaft-support system around actual journals and clearances, and then configuring the indicator and drive system around the measurement feature and tolerance.
This first-party model page brings together H-40 capacity, current and legacy metric references, the 140-40HS short-roller set, H/HL support accessories, indicator options, the published Standard Black accuracy class and the dedicated H-40 motorized-drive option so engineers can evaluate the complete platform in one place.
Current Model SelectionH-40 · Standard Shaft Gage · Vertical Carrier
20–105 mm / -40 model class with 12 in published shaft capacity.
Dedicated H-40 Roller System140-40HS · Full Plain Short Rollers
Approx. 1.0 in / 25 mm roller length for the H-40 shaft class.
Current Standard Top Roller230-40 · 1 × 5/16 in · 25 × 8 mm
Identified as standard for -40 models in current parts documentation; legacy catalog literature shows a different standard.
Published H-40 AccuracyStandard Black ≤4 µm
Precision Gold is not published for -40 models in the current parts documentation.
Current Motorized Option274-40 · H-40 Variable Speed Motor Assembly
17 in / 432 mm base with current 24 VDC / 0–10 rpm variable-speed architecture.
H-40 Technical FAQ
Questions engineers, quality teams and buyers ask before specifying a long-shaft concentricity gage.
The Universal Punch H-40 is a Standard Shaft Concentricity Gage with a Vertical Carrier for cylindrical shafts from 3/4–4 in in diameter and up to 12 in (305 mm) long.
Universal Punch consistently publishes a 3/4–4 in inch capacity. Legacy catalog literature uses 20–102 mm, while current model-selection documentation places H-40 in the 20–105 mm -40 class.
Universal Punch publishes a maximum H-40 part length of 12 in (305 mm).
Universal Punch catalog literature publishes an H-40 shipping weight of 11.2 lb (5.1 kg).
Both serve the large -40 diameter class and use Vertical Carrier architecture. H-40 is a Standard Shaft Gage with up to 12 in (305 mm) part-length capacity, while G2-40 is a Side Checker Gage published for parts up to 8 in (203 mm) long.
H-40 accommodates shafts up to 12 in (305 mm) long. HL-40 extends the same large shaft family to a published maximum length of 24 in (610 mm).
Yes. Current Universal Punch parts documentation lists Part No. 140-40HS as the Full Plain Short Roller Set for the H-40 size class, with approximately 1.0 in (25 mm) roller length.
Current Universal Punch parts documentation identifies Part No. 230-40, 1 × 5/16 in (25 × 8 mm), as the standard top roller for -40 models. Legacy catalog literature shows a different standard, so final top-contact selection should be confirmed when quoting.
The published Universal Punch accuracy classification applicable to the H-40 is Standard Black at better than or equal to 4 microns (0.00016 in).
No. Current Universal Punch parts documentation limits Precision Gold to -10 and -20 model classes. H-40 is a -40 model, so Precision Gold should not be represented as its standard published classification.
Current Universal Punch parts documentation states that the Concentricity Gaging System classifications are calibrated and directly traceable to NIST.
Yes. Universal Punch publishes analog and digital test indicators together with multiple mounts, swivel supports and H/HL carrier accessories.
Yes. Current parts documentation lists the H-40 Variable Speed Motor Assembly, Part No. 274-40, with a 17 in (432 mm) base plate.
The current Universal Punch variable-speed drive architecture is documented at 24 VDC with a 0–10 rpm range and forward/reverse control.
Send the part drawing, shaft diameter, overall length, support journal diameters and widths, nearby shoulders, splines, grooves or threads, feature being measured, datum relationship, tolerance, required indicator resolution, calibration requirements and whether manual or motorized rotation is preferred.
Configure the H-40 Around the Actual Shaft
The shaft drawing—not the model number alone—determines the final inspection system.
Send Universal Punch the part drawing, shaft diameter, overall length, support journal diameters and widths,
nearby shoulders, splines, grooves or threads, feature being measured, measurement direction, tolerance,
required indicator resolution, calibration requirements, production or inspection volume, and whether manual or motorized rotation is preferred.
