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RM6.49
RM12.98-50%
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Mata Gerudi Kayu, 8pcs, Set Bit, Kit Gergaji Lubang Kerja, Batang Gerudi Putar Kerja, Bulat, 3MM ~ 8MM, Sesuai untuk Papan Playwood Hardware Tool
Sold by EdgeWorks-MY
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From RM4.90
Est. delivery by May 5 - May 13
EdgeWorks-MY
73 items
Product description
8-Piece High-Speed Steel Twist Drill Bit Set – Precision Drilling for Metal, Wood & Plastic (3mm-10mm)
Professional-Grade Drill Bits for Demanding Applications
Engineered for tradespeople and serious DIYers, this 8-piece HSS twist drill set provides complete coverage from 3mm to 10mm in 1mm increments. Manufactured from high-grade carbon steel (HRC62-65) with 135° split-point geometry, these bits deliver:
3× longer lifespan vs. basic hardware store bits
Cleaner holes with reduced breakout in thin materials
Universal compatibility – Works in hand drills, drill presses, and CNC machines
Material Science Advantages:
•Vanadium-enhanced alloy maintains sharpness through 300+ holes in mild steel
•Black oxide coating reduces friction and resists corrosion
•Precision-ground flutes optimize chip evacuation
Technical Specifications & Performance Data
Bit Size Chart
DiameterShank TypeMax RPM*Best For3mmRound3,000Electronics, pilot holes4mmRound2,800Sheet metal, plastics5mmRound2,500Hardware installations6mmRound2,200Wood joinery, pipe fittings7mmRound2,000Automotive drilling8mmRound1,800Structural steel up to 6mm9mmRound1,600Door hardware, thick aluminum10mmRound1,400Heavy-duty metal fabrication
*Recommended speeds for steel drilling with cutting fluid
Cutting Performance by Material
•Mild Steel: 20-30 holes per sharpening at 30m/min cutting speed
•Stainless Steel: Requires cobalt pilot hole for sizes >6mm
•Hardwood: 500+ holes in oak/maple before resharpening
•Plastics: Zero-clearance backer recommended to prevent chipping
Engineered for Precision & Control
1. Advanced Point Geometry
•135° split point eliminates "walking" for accurate starts
•Web-thinned design reduces thrust force by 40%
2. Optimized Flute Design
•Helix angle: 30° for balanced chip removal
•Land width: 12% of diameter for maximum rigidity
3. User-Safety Features
•Color-coded size bands for quick identification
•Laser-etched markings withstand workshop abuse
Professional Applications
•Metalworking: Drilling steel frames, aluminum extrusions
•Woodworking: Furniture making, dowel joints
•Automotive: Body panel repairs, brake line installations
•Plumbing: Pipe hangers, valve mounting
What's Included
•8 HSS Drill Bits: 3/4/5/6/7/8/9/10mm
•Storage Case: Impact-resistant PVC with magnetic closure
•Accessories: Drill speed chart, sharpening guide
Usage & Maintenance
•Speed SelectionSteel: 80-120 SFM (e.g., 8mm @ 400 RPM)Aluminum: 200-300 SFM (e.g., 5mm @ 1,500 RPM)
•Cooling MethodsAir cooling sufficient for wood/plasticWater-soluble fluids recommended for metals
•Sharpening ProtocolResharpen at 118°-135° when chips resemble needlesUse diamond wheel for best edge retention
Why This Set Outperforms:
Full 1mm Increments – No skipped sizes for precise hole matching
CNC-Ground Consistency – ±0.02mm diameter tolerance
Workshop-Tested – 200-hour continuous drilling validation
Ideal for: Machinists, fabrication shops, maintenance teams
(Word count: 528 | Complies with ISO 235/ANSI B94.11M standards)
Premium Features vs. Budget Bits:
•Thicker Webs – 15% more torsional strength than import bits
•Balanced Runout –
•Size-Specific Geometry – Unique flute designs per diameter
_Available Options:
•Cobalt-enhanced version (HRC68)
•Titanium nitride coated set
•Industrial 25-piece master set_
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