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NOGA MT USPOT back spotfacing tool machining an internal back face

USPOT® Back Spotfacing & Counterboring Tool

Machine hidden rear faces through the existing pilot hole, without flipping the workpiece. A semi-standard insert, customized to your feature, on the coolant-actuated UBACK UX tool-holder.

Configure USPOT Technical Center
SIZE RANGE

USPOT / UX Series at a Glance

The range is organized into six series. Each series groups three nominal pilot-hole sizes and defines the matching holder family, RFC capacity and maximum supported USPOT counterbore diameter.

SeriesPilot-Hole Rangemm / inchUSPOT ØDmax Range by Holdermm / inchStandard UX HoldersRFCmm / inch
BØ8–10 mmØ0.3150–0.394″Ø18.5–23 mmØ0.728–0.906″UX2080 / UX2090 / UX210043 mm1.693″
CØ11–13 mmØ0.433–0.512″Ø26–30 mmØ1.024–1.181″UX3110 / UX3120 / UX313052 mm2.047″
DØ14–16 mmØ0.551–0.630″Ø32.5–37 mmØ1.280–1.457″UX4140 / UX4150 / UX416072.5 mm2.854″
EØ17–19 mmØ0.669–0.748″Ø39.5–44 mmØ1.555–1.732″UX5170 / UX5180 / UX519076.5 mm3.012″
FØ20–22 mmØ0.787–0.866″Ø46–50.5 mmØ1.811–1.988″UX6200 / UX6210 / UX622076.5 mm3.012″
GØ23–25 mmØ0.906–0.984″Ø53–57.5 mmØ2.087–2.264″UX7230 / UX7240 / UX725072 mm2.835″
ØD LimitThe configurator uses the smaller of the insert design limit and the selected holder catalog ØDmax.
Pilot-Hole LengthThe required pilot-hole length L must be less than or equal to the selected holder RFC.
Series MatchThe USPOT insert series and UX tool-holder series must always match.
SELECTION WORKFLOW

How to Select the Correct UX Holder and USPOT Insert

Keep the process simple: holder first, then the insert geometry, then compatibility checks.

1

Start with Pilot Ød

Select the UX holder whose nominal / supported pilot range fits your through hole.

Example: Ød = 8.7 mm → Series B / UX2080 family
2

Define the Back Feature

Enter the required spotface / counterbore ØD, pilot-hole length L and corner radius R.

Check L ≤ RFC
3

Select Cutting Geometry

Choose the chip-former and coating / surface treatment for the workpiece material. Use the Insert Technology guide below or the configurator recommendation.

PL / ML / HL + coating
4

Verify Series & Designation

Confirm the insert series matches the UX holder and use the generated US designation for quotation / ordering.

US-d087-D176-B-R02-ML-NCT
USPOT INSERT TECHNOLOGY

Chip-Formers, Coatings & Surface Treatments

The chip-former controls the cutting-edge geometry; the coating or surface treatment controls heat resistance, wear behavior, friction and material adhesion. Use this section to understand the codes used by the USPOT configurator and insert designation.

1. Select the chip-formerChoose PL, ML or HL according to the material group and cutting-edge strength required for the application.
2. Select coating / treatmentThen select the coating or polishing treatment according to heat, wear, oxidation, abrasion and material-adhesion conditions.
PLPositive Cutting Land
USPOT PL Positive Cutting Land chip-former geometry

PL — Positive Cutting Land

Suitable for all-round purpose and ISO P, M, K, N and S materials, as well as composite materials.

PMKNSC
MLModerate Cutting Land
USPOT ML Moderate Cutting Land chip-former geometry

ML — Moderate Cutting Land

Suitable for ISO P, M, K, S and H materials.

PMKSH
HLNegative Cutting Land
USPOT HL Negative Cutting Land chip-former geometry

HL — Negative Cutting Land

Suitable for ISO P, M, K, S and H materials.

PMKSH
AVAILABLE OPTIONS

Coating Types & Surface Treatments

Comparison of NOGA coating / surface-treatment codes, key characteristics, typical applications and ISO material-group suitability.

NOGA's CodeCoatingKey FeaturesApplicationsIndustriesMaterial ExamplesISO GROUP
PMKNSH
NCTTiAlNExcellent thermal stability, oxidation resistance, and wear resistance.High-speed cutting and general-purpose machining. Works in wet & dry conditions.Aerospace, Automotive, General EngineeringAISI 304, 42CrMo4, Grey Cast Iron (GG), Ti6Al4V✓✓✓×✓✓
NCDTiAlSiNVery high hardness, extreme oxidation resistance (>1200°C). Excels in dry machining at high speeds. Suitable for hardened steels >45 Rc.High-performance machining in demanding environments.Aerospace, Automotive, Die & MoldInconel 718, AISI 4140, Ti6Al4V, Hastelloy✓✓××✓✓
NCAAlTiSiNHigh hardness, thermal stability, and wear resistance. Works well in dry, high-speed cutting. Suitable for hardened steels >45 Rc.High-speed machining in extreme conditions.Aerospace, Automotive, Precision EngineeringAISI 316, AISI H13, Hastelloy✓✓××✓✓
NCNAlCrNHigh oxidation resistance (to 1100°C), toughness, abrasion resistance.General machining in abrasive / wet conditions.Automotive, Aerospace, Die & MoldAISI 304, AISI 1045, Grey Cast Iron (GG), AL6061, Die Steels✓✓✓✓××
NCWAlTiNHigh hardness, wear resistance, thermal stability up to 1100°C.Heavy-duty machining and high-speed cutting. Dry & abrasive conditions.Aerospace, Automotive, Heavy EngineeringAISI 4340, M2 HSS, Grey Cast Iron (GG)✓✓✓×✓×
NCBTiB₂Excellent thermal stability, hardness, and very high conductivity. Prevents material adhesion and BUE.High-speed machining of non-ferrous metals.Aerospace, Automotive, ElectronicsAL7075, 6061-T6, Copper, Magnesium Alloys (AZ31), SiC composites×××✓✓×
POLPolishing
(Surface Treatment)		Removes scratches, burrs and micro-defects. Produces smooth finish and reduces friction.High-speed finishing of non-ferrous materials. Improves MRR and surface aesthetics.Aerospace, AutomotiveAL7075, 6061-T6, Copper, Magnesium Alloys (AZ31)×××✓××
P SteelM Stainless SteelK Cast IronN Non-FerrousS Heat-Resistant AlloysH Hardened Materials
Selection note: This guide explains the available geometry and surface-treatment codes. Use the USPOT configurator and application conditions to establish the starting recommendation, then verify performance under the actual workpiece material, rigidity, interrupted-cut condition and coolant setup.

USPOT Configurator & G-Code Generator

Enter the feature once: it checks the pilot range, ØD and L ≤ RFC, matches the UX holder, and outputs the USPOT designation and CNC program.

🔧 UBACK Configurator & G-Code Generator

USPOT / UCHAMF insert configurator · Tool-holder matching · CNC back counterboring & countersinking programs

1
Insert Type
2
Insert Configurator
3
Insert & Tool Match
4
CNC Program

Step 1: Select Insert Type

Choose the UBACK application you need. The configurator will build the exact insert designation and match the correct UX tool-holder.

Click an insert type to continue — the configurator opens automatically.

Step 2: Insert Configurator

Enter your application dimensions. All designation codes are generated in metric.

⚡ Quick Fill from Insert Designation (optional)

The form fills itself as you type. Enter a full designation, or just a NOGA SKU (e.g. US2003) to pull the insert straight from the ERP database.

⚙ Configuration Parameters

📏 Unit System mm inch
Range: 8.0–25.0 mm
Distance the insert travels through the part — must be ≤ RFC of the tool-holder.
Range: 0.1–3.0 mm
Default R = 0.4 mm (.01575″) → code R04
Auto-suggested from material
Select a material group to see the suggested coating

📐 Technical Diagram

Loading 3D engine…
⚠ 3D view unavailable — check your internet connection (Three.js). The 2D drawing still works.
Drag to rotate · scroll to zoom · right-drag to pan
ⓘ Legend

Step 3: Your Insert & Tool-Holder

Matched configuration based on your application. The insert series always matches the tool-holder series.

🔩 Insert

—
SKU:UPON ORDER
Designation Breakdown

🛠 UX Tool-Holder

—
SKU:—
UX tool-holder dimensional drawing

Step 4: Generate CNC Program

Build the back-machining cycle for your controller using the matched tool-holder and insert.

CNC Controller
Cutting Conditions

📊 Recommended Cutting Data

Cutting Speed
-
m/min (Vc)
Feed / Rev
-
mm/rev (fn)
Spindle Speed
-
RPM
Feed Rate
-
mm/min
Program Options
Actuates the insert
Added during the cut
Verify per machine
FANUC / Mazak O-number
Operation Parameters
Distance above material for safe traverse
Depth of through-hole from part bottom (usually 0)
⛔
RFC Limit Exceeded!
Final depth of the back operation from the bottom face
Time to wait for coolant pressure (open/close insert)
Feed rate for non-cutting moves
Auto-filled from cutting data — adjust as needed

Generated G-Code Program


        

        

          ⚠
          

            For reference only. Generated CNC programs must be reviewed and validated by a qualified CNC operator before use, and run for the first time with caution (dry run, single block, reduced overrides). NOGA accepts no liability for any damage or loss arising from their use. Verify all values against your machine and setup.
            
          

        

        

          
          
        

      

    


  

  
NOGA MT UBACK Configurator & G-Code Generator  ·  version —











						

				

		

				

					










STANDARD UX TOOL-HOLDERS
Full USPOT Tool-Holder Reference
Use the configurator for selection; use this Metric / Inch table for dimensional verification, spare parts and setup references. LTB1 depends on the USPOT insert size and the listed value is the maximum permitted value.








USPOT / UX Dimensional Drawing


Reference drawing for the USPOT insert mounted in the UBACK UX tool-holder. Use it together with the table dimensions below.



CLICK TO ENLARGE




USPOT insert mounted in UBACK UX tool-holder dimensional drawing






Smart pilot search: a number by itself is treated as a pilot-hole diameter in mm. Example: 10 → UX2100. For inches, type 0.394 inch or 0.394". You can also search UX4160, Series D, RFC 72.5, ØD 37 or spare-part codes.




Show / hide complete Metric / Inch holder table
Ød minmm / inchSKUDescriptionSeriesØDS h6mm / inchFLmm / inchRFCmm / inchHmm / inchLmm / inchL1mm / inchLTB1 maxmm / inchUSPOT ØDmaxmm / inchPiston PlugInsert Screw
Ø8 mmØ0.315″UX2080UX-d080-B-C16-H62-L115BØ16 mmØ0.630″17 mm0.669″43 mm1.693″62 mm2.441″115 mm4.528″53 mm2.087″7.3 mm0.287″Ø18.5 mmØ0.728″UX0011 / M5×6UX0005 / M2.5×0.35×7B


Ø9 mmØ0.354″UX2090UX-d090-B-C16-H62-L115BØ16 mmØ0.630″17.8 mm0.701″43 mm1.693″62 mm2.441″115 mm4.528″53 mm2.087″7.3 mm0.287″Ø21 mmØ0.827″UX0011 / M5×6UX0005 / M2.5×0.35×7B


Ø10 mmØ0.394″UX2100UX-d100-B-C16-H62-L115BØ16 mmØ0.630″18.8 mm0.740″43 mm1.693″62 mm2.441″115 mm4.528″53 mm2.087″7.3 mm0.287″Ø23 mmØ0.906″UX0011 / M5×6UX0005 / M2.5×0.35×7B


Ø11 mmØ0.433″UX3110UX-d110-C-C16-H80-L133CØ16 mmØ0.630″27 mm1.063″52 mm2.047″80 mm3.150″133 mm5.236″53 mm2.087″12.4 mm0.488″Ø26 mmØ1.024″UX0011 / M5×6UX0006 / M3×0.35×10C


Ø12 mmØ0.472″UX3120UX-d120-C-C16-H80-L133CØ16 mmØ0.630″27.3 mm1.075″52 mm2.047″80 mm3.150″133 mm5.236″53 mm2.087″12.4 mm0.488″Ø28 mmØ1.102″UX0011 / M5×6UX0006 / M3×0.35×10C


Ø13 mmØ0.512″UX3130UX-d130-C-C16-H80-L133CØ16 mmØ0.630″28 mm1.102″52 mm2.047″80 mm3.150″133 mm5.236″53 mm2.087″12.4 mm0.488″Ø30 mmØ1.181″UX0011 / M5×6UX0006 / M3×0.35×10C


Ø14 mmØ0.551″UX4140UX-d140-D-C20-H105-L158DØ20 mmØ0.787″32.5 mm1.280″72.5 mm2.854″105 mm4.134″158 mm6.220″53 mm2.087″14 mm0.551″Ø32.5 mmØ1.280″UX0012 / M6×6UX0007 / M3×0.35×13D


Ø15 mmØ0.591″UX4150UX-d150-D-C20-H105-L158DØ20 mmØ0.787″32.5 mm1.280″72.5 mm2.854″105 mm4.134″158 mm6.220″53 mm2.087″14 mm0.551″Ø34.5 mmØ1.358″UX0012 / M6×6UX0007 / M3×0.35×13D


Ø16 mmØ0.630″UX4160UX-d160-D-C20-H105-L158DØ20 mmØ0.787″32.5 mm1.280″72.5 mm2.854″105 mm4.134″158 mm6.220″53 mm2.087″14 mm0.551″Ø37 mmØ1.457″UX0012 / M6×6UX0007 / M3×0.35×13D


Ø17 mmØ0.669″UX5170UX-d170-E-C20-H115-L170EØ20 mmØ0.787″38.5 mm1.516″76.5 mm3.012″115 mm4.528″170 mm6.693″55 mm2.165″16.5 mm0.650″Ø39.5 mmØ1.555″UX0012 / M6×6UX0008 / M3×0.35×16E


Ø18 mmØ0.709″UX5180UX-d180-E-C20-H115-L170EØ20 mmØ0.787″38.5 mm1.516″76.5 mm3.012″115 mm4.528″170 mm6.693″55 mm2.165″16.5 mm0.650″Ø41.5 mmØ1.634″UX0012 / M6×6UX0008 / M3×0.35×16E


Ø19 mmØ0.748″UX5190UX-d190-E-C20-H115-L170EØ20 mmØ0.787″38.5 mm1.516″76.5 mm3.012″115 mm4.528″170 mm6.693″55 mm2.165″16.5 mm0.650″Ø44 mmØ1.732″UX0012 / M6×6UX0008 / M3×0.35×16E


Ø20 mmØ0.787″UX6200UX-d200-F-C25-H120-L175FØ25 mmØ0.984″43.5 mm1.713″76.5 mm3.012″120 mm4.724″175 mm6.890″55 mm2.165″18.8 mm0.740″Ø46 mmØ1.811″UX0013 / M8×6UX0009 / M4×0.5×19F


Ø21 mmØ0.827″UX6210UX-d210-F-C25-H120-L175FØ25 mmØ0.984″43.5 mm1.713″76.5 mm3.012″120 mm4.724″175 mm6.890″55 mm2.165″18.8 mm0.740″Ø48.5 mmØ1.909″UX0013 / M8×6UX0009 / M4×0.5×19F


Ø22 mmØ0.866″UX6220UX-d220-F-C25-H120-L175FØ25 mmØ0.984″43.5 mm1.713″76.5 mm3.012″120 mm4.724″175 mm6.890″55 mm2.165″18.8 mm0.740″Ø50.5 mmØ1.988″UX0013 / M8×6UX0009 / M4×0.5×19F


Ø23 mmØ0.906″UX7230UX-d230-G-C25-H120-L175GØ25 mmØ0.984″48 mm1.890″72 mm2.835″120 mm4.724″175 mm6.890″55 mm2.165″21 mm0.827″Ø53 mmØ2.087″UX0013 / M8×6UX0010 / M4×0.5×21G


Ø24 mmØ0.945″UX7240UX-d240-G-C25-H120-L175GØ25 mmØ0.984″48 mm1.890″72 mm2.835″120 mm4.724″175 mm6.890″55 mm2.165″21 mm0.827″Ø55.5 mmØ2.185″UX0013 / M8×6UX0010 / M4×0.5×21G


Ø25 mmØ0.984″UX7250UX-d250-G-C25-H120-L175GØ25 mmØ0.984″48 mm1.890″72 mm2.835″120 mm4.724″175 mm6.890″55 mm2.165″21 mm0.827″Ø57.5 mmØ2.264″UX0013 / M8×6UX0010 / M4×0.5×21G
No UX tool-holder matches this search. Try a SKU, series letter, pilot diameter, RFC value, ØDmax or spare-part code.


Counterbore ToleranceSpecified achieved ØD tolerance: ±0.1 mm / 0.004″.
Tool + InsertUX tool-holders and USPOT inserts are sold separately.
Spare PartsStandardized replacement items include hex key, insert replacement pin, clamping screw and piston plug.






USPOT at a glance
Screening values. The configurator confirms the exact holder and insert.




Pilot-Hole Range
Ø8–25 mm / 0.315–0.984″


Counterbore / Spotface ØD Range
Ø8.5–57.5 mm / 0.335–2.264″


Pressure Actuation
Internal coolant, emulsion or air


Minimum Pressure
6 bar / 90 PSI


ØD Counterbore / Spotface Tolerance
±0.1 mm / ±0.004″


Tool-Holder Family
UBACK UX / DURASHIELD




Primary compatibility checks: pilot-hole length L ≤ RFC, requested counterbore / spotface diameter ØD must remain within the selected holder / insert limit, and the USPOT insert series must match the UX holder series.




Selection and technical links
Start with the Application — Not the Catalog Table
Start with the application and configurator, then use the technical facts, range, holder data and coding references for verification.



Configure USPOT
Enter pilot diameter, ØD, pilot-hole length, radius and material. Match the UX holder and generate the insert designation.
Open configurator 
Check the Range
See the B–G series, pilot-hole ranges, holder maximum ØD values and RFC capacity before configuring.
View range 
Selection Logic
Follow the four checks that determine holder, insert geometry and compatibility.
How to select 
Technical Center
Programming, insert replacement, cooling configurations, cutting data, chip-formers and coatings.
Open technical info 







Application examples
Typical rear faces USPOT reaches through the pilot hole, continuous and interrupted.




UBACK USPOT rear-side application geometry example 1
Internal Rear-Face Access
Reach a hidden rear surface through the pilot hole without turning or repositioning the workpiece.


UBACK USPOT rear-side application geometry example 2
Restricted-Access Geometry
Use the foldable insert where conventional front-side tooling cannot physically reach the machining surface.


UBACK USPOT rear-side application geometry example 3
Deep / Recessed Back Surface
Match pilot-hole length to holder RFC and reach the required rear-side machining plane inside deeper components.


UBACK USPOT rear-side application geometry example 4
Complex Internal Access
Apply rear spotfacing or counterboring where part geometry makes a conventional straight tool approach impractical.


UBACK USPOT rear-side application geometry example 5
Interrupted Rear Surfaces
USPOT can be applied to selected interrupted rear surfaces when rigidity, insert engagement and cutting conditions are suitable.




How the UBACK mechanism works
Coolant, emulsion or air through the spindle (6 bar / 90 PSI minimum) opens the insert below the part and lets it fold back for a safe exit.











UBACK hydraulic mechanism - insert open, cut and retract video preview

Plays muted when in view














1
Enter with the Insert Folded
Position above the pilot hole and move through the bore with the insert retracted to protect the pilot-hole surface.


2
Move Below the Workpiece
Use the holder FL / RFC geometry to reach a safe position below the rear face before the cutting move.


3
Actuate & Machine
Internal coolant pressure actuates the insert. Approach the rear face and machine the required spotface / counterbore depth.


4
Close & Retract
Retract to the safe position, turn coolant pressure off as required by the cycle, fold the insert and exit through the pilot hole.


Programming: the cycle uses FL and LTB positioning and coolant on/off commands. The configurator generates controller-specific G-code; verify it on the machine before production.




IDENTIFICATION & ORDERING
Understand the Holder and USPOT Insert Codes
The configurator creates the designation automatically. These diagrams remain useful as a visual reference for purchasing, engineering drawings and quotations.




UBACK UX tool-holder coding system
UX Tool-Holder Coding
Holder designation communicates pilot diameter, series, shank size, working height and overall length.


USPOT insert coding system
USPOT Insert Coding
Insert designation identifies pilot diameter, counterbore diameter, series, radius, chip-former and coating.




ORDERING EXAMPLE
AISI 4340 · 42 HRC
Pilot HoleØ8.7 mm / 0.343″
Spotface ØDØ17.6 mm / 0.693″
Corner RadiusR0.2 mm
MaterialAISI 4340 / 42 HRC
RECOMMENDED TOOL-HOLDERUX2080 · UX-d080-B-C16-H62-L115
USPOT INSERT DESIGNATIONUS-d087-D176-B-R02-ML-NCT
USPOT special insert ordering example






USPOT VIDEOS
Watch USPOT & UBACK in Action
Inline previews let visitors understand the machining concept without leaving the product page. The USPOT product demonstration is lazy-loaded so it does not delay the initial page render. The UBACK mechanism video is shown in the Operating Principle section above.







USPOT by NOGA MT - High-Accuracy Spot Facing with Hydraulic Control video preview

AUTO-PLAYS WHEN VISIBLE



USPOT VIDEO
USPOT by NOGA MT | High-Accuracy Spot Facing with Hydraulic Control
Product demonstration focused on USPOT hydraulic operation and precision rear-side spotfacing.








UX TOOL-HOLDER PLATFORM
DURASHIELD Tool-Holders
DURASHIELD identifies NOGA MT's premium holder platform. The UX holder family uses a passivated construction designed for corrosion resistance, structural integrity and demanding industrial service.
HIGH STRENGTHTOUGHNESSWEAR RESISTANCEMACHINABILITYHEAT RESISTANCECORROSION RESISTANCE


FAQ
USPOT Selection Questions


Can USPOT machine a back counterbore without turning or flipping the workpiece?
Yes. USPOT reaches the hidden rear face through the existing pilot hole, allowing CNC back spotfacing or counterboring without turning or flipping the workpiece.


How do I select the correct USPOT insert diameter?
Start with the pilot-hole diameter and select the matching UX holder series. Then enter the required spotface diameter ØD, pilot-hole length L and corner radius R in the configurator. The required L must satisfy L ≤ RFC, ØD must remain within the selected holder / insert limit, and the insert series must match the UX holder series.


What is the maximum back spotface diameter for USPOT?
The maximum depends on the selected UX holder and series. Across the standard USPOT / UBACK range, spotface diameters extend up to Ø57.5 mm / 2.264″. Use the configurator or the Size Range table to verify the exact ØD limit for your pilot-hole diameter and holder.


What is USPOT used for?
USPOT is the UBACK flat-bottom insert solution for CNC back spotfacing and back counterboring through an existing pilot hole.


How is the insert opened and closed?
The UX tool-holder uses spindle coolant pressure to actuate the insert. The system supports coolant, emulsion or air with a minimum pressure of 6 bar / 90 PSI.


What is the most important geometry check?
Confirm that the pilot-hole length L is less than or equal to the selected holder RFC and that the requested ØD is within the holder / insert design limit.


Are USPOT inserts standard products?
USPOT is a semi-standard solution customized to the customer's specific feature. The configurator creates the application-specific designation and matches the corresponding UBACK UX holder series.


What is the ØD counterbore / spotface tolerance?
The product page specifies an achieved counterbore / spotface diameter tolerance of ±0.1 mm / 0.004″.


Where are programming and cutting recommendations?
Use the UBACK Technical Center ↗ for continuous / interrupted-cut programming, insert replacement, cooling configurations, coatings, chip-formers and detailed cutting recommendations.


Can USPOT perform interrupted cuts?
Yes. USPOT can perform interrupted back spotfacing and counterboring when the cutting path crosses gaps, openings, slots or other non-continuous rear surfaces. Final performance depends on the actual geometry, material, setup rigidity and cutting conditions, so the application should be validated before production.




Have the Drawing? Configure USPOT First.
Enter the application dimensions in the configurator to identify the correct UX tool-holder and build the USPOT designation. For special applications, attach the workpiece drawing and material details when requesting a quotation.
OPEN CONFIGURATORCONTACT NOGA MT ↗








				

				

				

		
		
			


	



			
		






	
	
		


	

	














	

























	
	


		


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