UFIBER® TECHNICAL INFORMATION

UFIBER® Point Brush – Technical Specifications & Machining Guide

UFIBER® Point Brushes are compact ceramic-fiber tools designed for precision deburring, polishing and finishing in small bores, grooves, recesses, corners and other narrow or localized features.

Available in diameters from Ø1.0 to Ø3.0 mm for CNC machines, robotic systems and controlled hand-held rotary operation.

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Features

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Precision Access

Designed for accurate deburring, polishing and finishing in small, narrow and complex areas.

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CNC & Robotic Ready

Suitable for automated machining on CNC machines, machining centers and robotic systems.

Ø1–3 mm Range

Five compact diameters provide controlled access to localized features and small bores.

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Localized Finishing

Ideal for narrow bores, grooves, recesses, corners and detailed internal features.

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Up to 12,000 RPM

Maximum spindle speed is 12,000 RPM when correctly mounted and securely operated.

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Wide Grit Range

Supports controlled deburring through very fine polishing depending on material and finish requirements.

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Point Brush Product Range

Dimensions for Ød=1.0-2.0mm (0.039-0.079″)

Dimensions for Ød=2.5-3.0mm (0.098-0.118″)

Description	Diameter mm	Diameter inch	Maximum Spindle Speed
UF-PB-…-D1-L20	Ø1.0	0.039"	12,000 RPM
UF-PB-…-D1.5-L20	Ø1.5	0.059"	12,000 RPM
UF-PB-…-D2-L20	Ø2.0	0.079"	12,000 RPM
UF-PB-…-D2.5-L20	Ø2.5	0.098"	12,000 RPM
UF-PB-…-D3-L20	Ø3.0	0.118"	12,000 RPM

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Point Brush Application & Contact Methods

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TIP CONTACT

Axial Contact

Use the brush tip for localized finishing of recess bottoms, small flat areas and precise axial-contact applications.

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SIDE CONTACT

Radial / Side Contact

Use controlled side contact for groove walls, bore walls and narrow internal surfaces. Avoid excessive lateral loading.

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ANGLED CONTACT

Angled / Localized Contact

Use light angled contact for corners, transitions and complex local features where direct axial access is limited.

AVOID

Avoid Excessive Side Loading

Do not force the brush strongly against an edge or wall. Excessive lateral bending can reduce process stability and accelerate brush wear.

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Grit Selection by Burr Condition & Material

Grit	Code	Relative Action	Typical Application
#150	G	Very aggressive	Heavy burrs and hardened materials
#200	P	Aggressive	Hardened steels and difficult burrs
#400	V	Medium-coarse	Steel, stainless steel and heat-resistant alloys
#600	O	General deburring	General-purpose metal deburring
#800	B	Fine deburring	Fine burr removal and pre-finishing
#1000	W	Fine finishing	Controlled surface finishing
#1200	R	Fine polishing	Final finishing and non-ferrous materials
#2000	M	Very fine	Aluminum, plastics and delicate surfaces
#3000	Z	Ultra-fine	Composites and high-finish applications
#6000	A	Micro-finish	Final polishing of composites and plastics

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How to Use the UFIBER® Point Brush

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1. Select the Diameter

Choose the smallest brush diameter that provides stable access and sufficient contact with the target feature.

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2. Start with Light Engagement

Begin with minimum brush engagement. For Ø1.0 and Ø1.5 mm brushes, start at the lower end of the recommended feed and engagement ranges.

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3. Maintain Controlled Movement

Keep the brush moving through the target area and avoid excessive side loading or prolonged contact at one point.

Brush Engagement: The engagement value represents approximate contact or deflection of the ceramic fibers against the workpiece. It does not represent the amount of workpiece material removed.

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UFIBER® POINT BRUSH — MACHINING RECOMMENDATIONS

Starting parameters for CNC deburring and polishing • Ø1–3 mm Point Brushes • Metric and imperial units • Use the lower value first and optimize on the actual component
WORKPIECE MATERIAL						DEBURRING				POLISHING				COOLANT
ISO	Material Group	Material Details	Condition	AISI / SAE / ASTM	DIN W.-Nr.	RPM	Feed mm/min \| in/min	Brush Engagement mm \| inch	UFIBER Deburring Grit	RPM	Feed mm/min \| in/min	Brush Engagement mm \| inch	UFIBER Polishing Grit	Recommended Method
P	Non-alloy steel and cast steel, free cutting steel	<0.25% C	Annealed	1020	1.0044	8,000–12,000	250–500 9.8–19.7	0.03–0.10 0.001–0.004"	#400 (V) / #600 (O) #800 (B) for fine burrs	8,000–12,000	180–400 7.1–15.7	0.02–0.06 0.001–0.002"	#800 (B) → #1200 (R)	Air / Wet
	Non-alloy steel and cast steel, free cutting steel	≥0.25% C	Annealed	1035	1.0501	8,000–12,000	250–500 9.8–19.7	0.03–0.10 0.001–0.004"	#400 (V) / #600 (O) #800 (B) for fine burrs	8,000–12,000	180–400 7.1–15.7	0.02–0.06 0.001–0.002"	#800 (B) → #1200 (R)	Air / Wet
	Non-alloy steel and cast steel, free cutting steel	<0.55% C	Quenched and tempered	1045	1.1201	7,000–10,000	200–450 7.9–17.7	0.03–0.09 0.001–0.004"	#150 / #200 / #400 #150 heavy • #200 general • #400 controlled	7,000–10,000	150–350 5.9–13.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air / Wet
	Non-alloy steel and cast steel, free cutting steel	≥0.55% C	Annealed	1055	1.0535	7,000–10,000	200–450 7.9–17.7	0.03–0.09 0.001–0.004"	#150 / #200 / #400 #150 heavy • #200 general • #400 controlled	7,000–10,000	150–350 5.9–13.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air / Wet
	Non-alloy steel and cast steel, free cutting steel	≥0.55% C	Quenched and tempered	1060	1.1221	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air / Wet
	Low alloy and cast steel (<5% alloying elements)	—	Annealed	G92600	1.5028	7,000–10,000	200–450 7.9–17.7	0.03–0.09 0.001–0.004"	#400 / #600	7,000–10,000	150–350 5.9–13.8	0.02–0.06 0.001–0.002"	#800 → #1200	Air / Wet
	Low alloy and cast steel (<5% alloying elements)	—	Quenched and tempered	4130	1.7218	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air / Wet
	Low alloy and cast steel (<5% alloying elements)	—	Quenched and tempered	4142	1.2332	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air / Wet
	Low alloy and cast steel (<5% alloying elements)	—	Quenched and tempered	5045	1.7006	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air / Wet
	High alloyed steel, cast steel and tool steel	—	Annealed	H13	1.2344	5,000–8,000	150–350 5.9–13.8	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	120–280 4.7–11.0	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred
	High alloyed steel, cast steel and tool steel	—	Quenched and tempered	M33	1.3249	5,000–8,000	150–350 5.9–13.8	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	120–280 4.7–11.0	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred
	Stainless steel and cast steel	Ferritic / martensitic	—	420	1.4021	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	150–320 5.9–12.6	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred
	Stainless steel and cast steel	Martensitic	—	—	—	5,000–8,000	150–350 5.9–13.8	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	120–280 4.7–11.0	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred
M	Stainless steel	Austenitic, duplex	—	304L	1.4306	7,000–10,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#400 / #600 #800 for fine burrs	7,000–10,000	150–350 5.9–13.8	0.02–0.06 0.001–0.002"	#800 → #1200	Wet recommended
K	Gray cast iron (GG)	Ferritic / pearlitic	—	Class 25	0.6015	7,000–10,000	200–450 7.9–17.7	0.03–0.09 0.001–0.004"	#200 / #400 #600 for fine burrs	7,000–10,000	150–350 5.9–13.8	0.02–0.06 0.001–0.002"	#600 → #1000	Air preferred
	Gray cast iron (GG)	Pearlitic / martensitic	—	Grade H20	36037	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air preferred
	Nodular cast iron (GGG)	Ferritic	—	60-40-18	0.7043	7,000–10,000	220–480 8.7–18.9	0.03–0.10 0.001–0.004"	#400 / #600	7,000–10,000	160–350 6.3–13.8	0.02–0.06 0.001–0.002"	#800 → #1200	Air preferred
	Nodular cast iron (GGG)	Pearlitic	—	F33500	0.705	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air preferred
	Malleable cast iron	Ferritic	—	A47	0.8135	7,000–10,000	220–480 8.7–18.9	0.03–0.10 0.001–0.004"	#400 / #600	7,000–10,000	160–350 6.3–13.8	0.02–0.06 0.001–0.002"	#800 → #1200	Air preferred
	Malleable cast iron	Pearlitic	—	A220 Class	0.8155	6,000–9,000	180–400 7.1–15.7	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Air preferred
N	Aluminum-wrought alloys	—	Not hardenable	5005	3.3315	9,000–12,000	300–600 11.8–23.6	0.02–0.08 0.001–0.003"	#800 / #1200	9,000–12,000	250–500 9.8–19.7	0.02–0.05 0.001–0.002"	#1200 → #2000	Wet / MQL
	Aluminum-wrought alloys	—	Hardenable	7075	3.4365	9,000–12,000	300–600 11.8–23.6	0.02–0.08 0.001–0.003"	#800 / #1200	9,000–12,000	250–500 9.8–19.7	0.02–0.05 0.001–0.002"	#1200 → #2000	Wet / MQL
	Aluminum-cast alloys	≤12% Si	Not hardenable	518	3.3292	9,000–12,000	300–600 11.8–23.6	0.02–0.08 0.001–0.003"	#800 / #1200	9,000–12,000	250–500 9.8–19.7	0.02–0.05 0.001–0.002"	#1200 → #2000	Wet / MQL
	Aluminum-cast alloys	≤12% Si	Hardenable	515	3.3241	8,000–11,000	280–550 11.0–21.7	0.02–0.08 0.001–0.003"	#800 / #1200	8,000–11,000	220–450 8.7–17.7	0.02–0.05 0.001–0.002"	#1200 → #2000	Wet / MQL
	Aluminum-cast alloys	>12% Si	High temperature	390	—	8,000–11,000	220–450 8.7–17.7	0.02–0.07 0.001–0.003"	#600 / #800	7,000–10,000	180–400 7.1–15.7	0.02–0.05 0.001–0.002"	#1000 → #1200	Wet / MQL
	Copper alloys	>1% Pb	Free cutting	C36000	2.0375	8,000–12,000	250–500 9.8–19.7	0.02–0.08 0.001–0.003"	#800 / #1200	8,000–12,000	200–400 7.9–15.7	0.02–0.05 0.001–0.002"	#1200 → #2000	Air / Wet
	Copper alloys	—	Brass	C22000	2.023	8,000–12,000	250–500 9.8–19.7	0.02–0.08 0.001–0.003"	#800 / #1200	8,000–12,000	200–400 7.9–15.7	0.02–0.05 0.001–0.002"	#1200 → #2000	Air / Wet
	Copper alloys	—	Electrolytic copper	C63000	2.0966	8,000–11,000	220–450 8.7–17.7	0.02–0.07 0.001–0.003"	#800 / #1200	7,000–10,000	180–400 7.1–15.7	0.02–0.05 0.001–0.002"	#1200 → #2000	Air / Wet
	Non-metallic	Duroplastics, fiber plastics	—	Bakelite	—	6,000–9,000	200–450 7.9–17.7	0.02–0.07 0.001–0.003"	#2000 / #3000	5,000–8,000	150–350 5.9–13.8	0.02–0.05 0.001–0.002"	#3000 → #6000	Dry air + extraction
	Non-metallic	Hard rubber	—	Ebonite	—	5,000–8,000	180–400 7.1–15.7	0.02–0.07 0.001–0.003"	#2000 / #3000	5,000–8,000	150–350 5.9–13.8	0.02–0.05 0.001–0.002"	#3000 → #6000	Dry air + extraction
S	High temperature alloys	Fe based	Annealed	330	1.4864	6,000–9,000	150–350 5.9–13.8	0.03–0.08 0.001–0.003"	#150 / #200 / #400	6,000–9,000	120–300 4.7–11.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet recommended
	High temperature alloys	Fe based	Hardened	S590	1.4977	5,000–8,000	130–300 5.1–11.8	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	100–250 3.9–9.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet recommended
	High temperature alloys	Ni or Co based	Annealed	Incoloy 825	2.4858	5,000–8,000	120–300 4.7–11.8	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	100–250 3.9–9.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet recommended
	High temperature alloys	Ni or Co based	Hardened	Inconel 718	2.4668	5,000–8,000	120–280 4.7–11.0	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	100–240 3.9–9.4	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet recommended
	High temperature alloys	Ni or Co based	Cast	Nimocast K24	2.4674	5,000–8,000	120–280 4.7–11.0	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	100–240 3.9–9.4	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet recommended
	Titanium alloys	—	Pure	Titanium G.1	3.7024	5,000–8,000	140–320 5.5–12.6	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	110–260 4.3–10.2	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet recommended
	Titanium alloys	—	Alpha+beta alloys, hardened	Titanium G.5	3.7165	5,000–8,000	120–280 4.7–11.0	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	100–240 3.9–9.4	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet recommended
H	Hardened steel	—	Hardened	HARDOX 500	—	5,000–8,000	120–300 4.7–11.8	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	100–250 3.9–9.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred
	Hardened steel	—	Hardened	HARDOX Extreme	—	5,000–8,000	100–250 3.9–9.8	0.03–0.06 0.001–0.002"	#150 / #200 / #400	5,000–8,000	90–220 3.5–8.7	0.02–0.04 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred
	Chilled cast iron	—	Cast	A532 IIIA 25% Cr	0.965	5,000–8,000	120–300 4.7–11.8	0.03–0.07 0.001–0.003"	#150 / #200 / #400	5,000–8,000	100–250 3.9–9.8	0.02–0.05 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred
	Hardened cast iron	—	Hardened	A532 IID 20% CrMo	0.9645	5,000–8,000	100–250 3.9–9.8	0.03–0.06 0.001–0.002"	#150 / #200 / #400	5,000–8,000	90–220 3.5–8.7	0.02–0.04 0.001–0.002"	#400 → #800 #1000 / #1200 final	Wet preferred

Point Brush starting parameters: Use the lower value first and optimize on the actual component. For Ø1.0 mm and Ø1.5 mm brushes, start at the lower end of the feed and brush-engagement ranges. Maximum spindle speed: 12,000 RPM.

Coolant Selection: Use the coolant method shown in the machining table as the starting recommendation. Coolant can assist with heat control, chip evacuation and surface-finish consistency. Always confirm compatibility with the workpiece material and the production process.

Recommended RPM vs. Maximum RPM: The machining table provides recommended starting RPM ranges by material. 12,000 RPM is the absolute maximum spindle speed and should not be interpreted as the recommended speed for every application.

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Controlling Deburring & Polishing Performance

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Increase Deburring Action

Coarser grit → slightly greater engagement → lower feed → additional controlled pass

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Reduce Aggressiveness

Finer grit → lighter engagement → higher feed → fewer passes

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Improve Surface Finish

Finer grit sequence → light contact → stable feed → controlled finishing passes

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Improve Brush Life

Reduce side loading → use minimum required engagement → maintain correct alignment

Important: Do not compensate for insufficient cutting action only by increasing pressure or side loading. Excessive fiber deflection can reduce process stability and brush life.

Point Brush Troubleshooting

Problem	Recommended Adjustment
Burr remains	Use a coarser grit → slightly increase engagement → reduce feed → add another controlled pass.
Excessive edge rounding	Increase feed → reduce brush engagement → select a finer grit → reduce RPM if necessary.
Brush marks	Use a finer grit → reduce engagement → maintain a stable finishing feed → add a light final pass.
Excessive brush wear	Reduce engagement → check alignment → minimize side loading → verify runout and clamping.
Poor surface finish	Use a progressive grit sequence → lighter final engagement → stable feed → verify brush cleanliness.
Vibration / unstable contact	Stop operation → check chuck, runout, brush condition and workholding before restarting.

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Brush Wear & Maintenance

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WEAR

Brush Wear Changes Cutting Behavior

As the ceramic fibers wear and become shorter, brush stiffness and contact behavior may change. Re-check the process when the brush has visibly shortened.

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PROCESS CONTROL

Compensate Gradually

If the process becomes too aggressive, reduce brush engagement, increase feed, reduce RPM if required, or move to a finer grit.

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CLEANING

Keep the Brush Clean

Remove accumulated machining debris, dust and coolant residue. Contamination can reduce consistency and surface-finish quality.

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INSPECTION

Inspect Before Production

Check the brush tip, shank, clamping condition and runout before use. Replace a damaged or unstable brush before production machining.

Process stability: Do not maintain performance by increasing pressure alone as the brush wears. Optimize engagement, feed, RPM and grit together.

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Point Brush Installation & Usage

①

01. Shank Grip

Grip the brush shank by at least 20 mm to ensure secure clamping.

②

02. Chuck Matching

Use a chuck or collet that correctly matches the brush shank diameter.

③

03. Minimize Runout

Keep spindle and tool runout as low as practical for stable contact.

④

04. Initial Engagement

Begin with minimum contact and increase engagement gradually only when required.

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05. Secure Workholding

Ensure the brush and workpiece are securely clamped before CNC operation.

⑥

06. Validate the Process

Confirm the selected parameters on the actual component before production use.

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Manual & CNC Operating Speed Guidelines

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HAND-HELD

Manual Operation

1,000 → 3,000 RPM

Start at approximately 1,000 RPM. Once stable control is established, increase gradually up to 3,000 RPM. Speeds above 3,000 RPM are not recommended for hand-held operation.

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CNC / ROBOTIC

Automated Operation

Up to 12,000 RPM

For securely clamped CNC or robotic applications, follow the machining recommendation table and never exceed 12,000 RPM.

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Point Brush Safety Precautions & Instructions

⚠

Operation Safety

• Do not exceed the specified maximum spindle speed.
• Do not use pneumatic-powered hand tools.
• Stop immediately if abnormal vibration occurs.
• Avoid prolonged machining at one fixed point.
• Avoid excessive side loading.

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Operator & Work Area Safety

• Wear suitable eye, skin and respiratory protection.
• Use suitable dust and particle extraction.
• Keep flammable materials away from the machining area.
• Ensure secure workholding and controlled access to the work area.

Process validation required: Actual performance depends on brush diameter, grit, workpiece material, hardness, burr geometry, machine rigidity, tool condition and operating conditions.

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