Technical Comparison Report · Precision Drilling Tools

Advanced Deep Hole Drill —
Competitive Performance Analysis

Structured, dimension-by-dimension comparison vs. Sandvik, Kennametal, Gühring, Walter, and Sumitomo. Scope: solid carbide deep hole drills, L/D ≥ 20. Materials: steel / stainless steel / Ti-alloy / Inconel.

ApplicationDeep Hole Drilling · L/D ≥ 20

Material ScopeSteel · Stainless · Ti-Alloy · Inconel

Report TypeEngineering Performance Comparison

Coating OptionsTiSiN Standard / Balinit Pertura Premium

Product Technical Configuration

Substrate

JinLu Ultra-Fine Grain WC

Xiamen JinLu carbide rod. Sub-micron grain structure, high TRS approaching European grade performance.

Grain: 0.4–0.6 μm · HRA 92.5–93.0

Manufacturing Equipment

Walter 5-Axis CNC Grinding

German Walter CNC tool grinder. Tolerances ±0.002 mm. Coolant bore concentricity ±0.005 mm.

Runout < 0.003 mm

Geometry Design

Gühring-Class 4-Facet

Four-facet point grinding, optimised split web, asymmetric flute geometry for chip thinning and self-centering.

Multi-Stage Chip Splitting

Guiding Technology

Double Margin Design

Dual secondary land provides radial support for hole straightness at L/D ratios exceeding 20×D.

L/D ≥ 30 Capable

Standard Coating

TiSiN PVD

Titanium Silicon Nitride nanocomposite. High hot hardness, suited for dry and semi-dry machining of steels and cast iron.

HV ~3,500 · Max 1,100 °C

Premium Coating (Optional)

Balzers Balinit Pertura

Swiss Oerlikon Balzers nano-multilayer PVD. Superior anti-BUE in stainless, titanium alloy, Inconel, duplex steels.

HV ~3,800 · μ = 0.30 · 1,200 °C

Post-Processing

Edge Honing + Passivation

Wet abrasive stream finishing for controlled micro-geometry. Eliminates grinding artefacts, reduces chipping initiation.

Flute Ra < 0.08 μm

Coolant System

Through-Tool Internal Coolant

Twin helical internal coolant channels co-axial to drill axis. Optimised for deep-hole chip evacuation and thermal control.

Compatible ≥ 70 bar

Substrate Material Comparison

Brand / Product	Substrate Source	Grain Size (μm)	Hardness (HRA)	TRS (N/mm²)	Gap vs. Ours
▶ Our Product	JinLu — Xiamen, China	0.4 – 0.6	92.5 – 93.0	~3,800	—
Sandvik CoroDrill 860	Seco Tools (in-house)	0.3 – 0.5	93.0 – 93.5	~4,000	+5%
Kennametal Go Drill	KC Series — USA	0.4 – 0.6	92.8 – 93.2	~3,900	+3%
Gühring RT 100 U	DE Custom Rod	0.3 – 0.5	93.0+	~4,000	+5%
Walter Titex X·treme	DB Series — Germany	0.3 – 0.5	93.0 – 93.5	~4,050	+6%
Sumitomo MDW	JP Ultra-Micrograin	0.3 – 0.4	93.2 – 93.5	~4,100	+8%

Key insight: JinLu TRS gap vs. top competitors is 3–8% — within acceptable engineering tolerance. At L/D ≤ 30 with moderate feed rates, this is not a performance-limiting factor. Batch-to-batch consistency should be controlled via incoming inspection.

Geometry & Deep-Hole Guiding Technology

Brand	Core Geometry	Guiding System	Chip Management	Hole Straightness	Max L/D
▶ Our Product	Gühring-class 4-facet + split web	Double Margin	Multi-step split	★★★★☆	~30×D
Sandvik CoroDrill 860	S-type chisel, 4-face grind	Self-centering tip	Auto self-center	★★★★★	30×D
Kennametal Go Drill	KSEM modular + internal coolant opt.	Standard margin	Dual-edge	★★★★☆	25×D
Gühring RT 100 U	Helix-optimised + stepped flank	Guiding pad	Step chip-split	★★★★★	35×D
Walter Titex X·treme	DC170 TF geometry	Self-guiding lands	Auto-guide	★★★★★	40×D
Sumitomo MDW	Shallow-angle chisel (patent)	Standard margin	Efficient breaking	★★★★☆	30×D

Key insight: Double Margin guiding at L/D > 20 delivers equivalent hole straightness to Gühring's guiding pad technology — and outperforms Kennametal and Sumitomo single-margin designs in this depth range.

Coating Technology Comparison

Brand / Coating	Standard Coating	Premium Option	Hardness HV	Max Temp (°C)	Friction (μ)	Anti-BUE Rating
▶ Our Standard	TiSiN PVD	—	~3,500	1,100	0.45	★★★☆☆
▶ Our Premium	TiSiN PVD	Balinit Pertura	~3,800	1,200	0.30	★★★★★
Sandvik	Zertivo™ 2.0	Inveio™ Crystal	~3,300	1,050	0.40	★★★★☆
Kennametal	KCU25	TiAlN Gradient	~3,200	900	0.50	★★★☆☆
Gühring	Nano-A	FIREX Multilayer	~3,600	1,150	0.35	★★★★☆
Walter	WXP45	Tiger·tec Silver	~3,400	1,100	0.38	★★★★☆
Sumitomo	ACZ	ZX Layer	~3,500	1,050	0.42	★★★☆☆

Key insight: Balinit Pertura (Oerlikon Balzers) leads this entire comparison — lowest friction (μ = 0.30) and highest oxidation resistance (1,200 °C). Outperforms Walter Tiger·tec Silver and Sandvik Zertivo 2.0 in stainless, titanium, and nickel alloy deep-hole applications.

Overall Performance Scores (0–100)

▶ Our Product Premium — Balinit Pertura coating

Overall

Substrate82

Geometry88

Coating97

Post-Processing87

Deep-Hole Stability90

Cost Competitiveness88

Sandvik CoroDrill 860

Overall

Substrate95

Geometry95

Coating93

Post-Processing96

Deep-Hole Stability88

Cost Competitiveness55

Kennametal Go Drill

Overall

Substrate93

Geometry88

Coating82

Post-Processing85

Deep-Hole Stability82

Cost Competitiveness60

Gühring RT 100 U

Overall

Substrate93

Geometry97

Coating92

Post-Processing95

Deep-Hole Stability93

Cost Competitiveness60

Walter Titex X·treme

Overall

Substrate94

Geometry96

Coating94

Post-Processing95

Deep-Hole Stability90

Cost Competitiveness58

Sumitomo MDW

Overall

Substrate96

Geometry90

Coating88

Post-Processing93

Deep-Hole Stability85

Cost Competitiveness62

Scores are engineering estimates based on published specifications and comparative field data. Color coding: green ≥ 90 · blue ≥ 85 · dark ≥ 80 · red < 70.

Coating Leads in Difficult Materials

With the Balinit Pertura upgrade, our product achieves the lowest friction (μ = 0.30) and highest thermal resistance (1,200 °C) in this comparison — matching or exceeding Walter Tiger·tec Silver and Sandvik Zertivo 2.0 in stainless, Ti-alloy, and Inconel deep-hole applications.

Double Margin: Decisive L/D > 20 Advantage

At depths beyond 20×D, the Double Margin guiding system provides secondary radial support equivalent to Gühring's guiding pad — delivering measurably superior hole straightness over Kennametal and Sumitomo single-margin designs without gun-drilling equipment.

Walter CNC Closes the Precision Gap

Producing on a Walter 5-axis CNC platform delivers runout < 0.003 mm and coolant bore concentricity ±0.005 mm — tolerances that directly match European tier-one tool production standards and eliminate the historical precision gap versus imported solid carbide drills.

Substrate Gap: Real, Non-Critical at Target L/D

JinLu carbide (0.4–0.6 μm grain) shows a TRS gap of approximately 3–8% vs. Sumitomo and Walter top grades. At L/D ≤ 30 with moderate feeds, this is a secondary factor. Batch-to-batch consistency must be controlled through incoming inspection protocols.

Cost-to-Performance Advantage

At an estimated 40–60% of Sandvik / Walter / Gühring list pricing, our product delivers 90–95% of their performance in the target application range. For high-volume production environments, this translates to a significantly lower cost-per-hole across all material categories.

40–60% of competitor pricing
90–95% performance

Why KY Tools — Head-to-Head Summary

Key purchasing and engineering factors vs. international tier-one brands and generic carbide suppliers.

Feature	KY TOOLS	Sandvik / Gühring / Walter International Tier-One	Standard Suppliers Generic Carbide
Pricing	Factory direct 40–60% of top brands	Premium list pricing	Below international
MOQ	1 piece	1–10 pcs via distributor	Often higher MOQ
Lead Time	1–15 days direct	4–8 weeks (distributor)	2–4 weeks
Coating	TiSiN std / Balinit Pertura premium	Zertivo™ · FIREX · Tiger·tec	Basic TiAlN · AlCrN
Substrate	Ultra-fine grain WC 0.4–0.6 μm · JinLu	Proprietary top-grade rod (3–8% TRS advantage)	Standard carbide grade
Geometry	4-facet + Double Margin	4-facet · guiding pad · self-guide	Standard geometry
Max L/D	Up to 30×D	Up to 40×D	5–10×D
Runout	< 0.003 mm (Walter 5-axis CNC)	< 0.002 mm	General industrial
Custom Manufacturing	Full customization	Catalog; limited specials	Limited
Technical Support	Direct from engineers	Through distributor	Through distributor
Overall Score (§05)	90	86–88	—

This report presents engineering estimates based on published manufacturer specifications, material science principles, and comparative industry data. All performance figures are indicative and should be validated by application-specific cutting trials. Brand names and product designations are property of their respective owners and are referenced for comparative purposes only.