does aligning the chuck to 118 also applies for 135 degree geometry and what is the significance of the notches on either-side of 118?

Yes it does. The significance of the notches enable you to alter the relief and chisel angle of the drill bit. By going + you will increase the relief angle of the drill bit, useful for high speed drilling in softer metals. And vis versa going -. 45 degrees is the correct chisel angle for a drill bit. By using the alignment notches + or - you can make the drill bit more or less aggressive. A less aggressive drill has a lower chisel and relief angle. I love mine, easy to set up and use. Hope this helps.

can the degree of angle of cut be changed

Yes, you can choose between 118 and 135 degrees. Many of the videos you can find on youtube and the video that comes with the sharpener show you how to do this. you may want to take a look at the following links: https://www.youtube.com/watch?v=8wWzW8BjtiM and https://www.youtube.com/watch?v=M6bC5imB31A

Is the 500X able to sharpen 13mm bits?

I don't have a 13mm bit to test, however I have a 12mm brad point bit and it fit in the collet/chuck with a little room to spare. So you should be able to sharpen a 13mm bit.

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Drill Doctor DD500X Twist Drill Bit Sharpener - 3/32" to 1/2" - Electric Sharpener - High Speed & Portable - For Steel, Masonry, Carbide & Tin-Coated Drill Bits - Adjustable 118° or 135° Angle

Drill Doctor DD500X Twist Drill Bit Sharpener - 3/32" to 1/2" - Electric Sharpener - High Speed & Portable - For Steel, Masonry, Carbide & Tin-Coated Drill Bits - Adjustable 118° or 135° Angle

Product ID: 671743

⚡High-speed electric sharpening

📏Adjustable 118° or 135° bit angles

🔧Sharpens 3/32" to 1/2" drill bits

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Description

⚡ Sharpen smarter, drill sharper — never miss a beat on your projects!

PRECISION ANGLE CONTROL - Customize your drill bit edge with adjustable 118° or 135° angles for flawless performance.
SPEED MEETS PORTABILITY - High-speed electric motor in a compact design lets you sharpen anywhere, anytime—no workshop required.
TRUSTED QUALITY WARRANTY - Engineered and calibrated in Oregon with a 3-year warranty, ensuring reliability and peace of mind.
VERSATILE BIT COMPATIBILITY - Sharpens steel, masonry, carbide, and tin-coated bits from 3/32" to 1/2", covering all your project needs.
EXTENDED BIT LIFE PERFORMANCE - Split cutting tips reduce wear and boost cutting efficiency, saving you time and money on replacements.

The Drill Doctor DD500X is a high-speed electric drill bit sharpener designed for professional and DIY use. It sharpens twist drill bits ranging from 3/32" to 1/2" with adjustable angles of 118° or 135°, compatible with steel, masonry, carbide, and tin-coated bits. Portable and precise, it extends bit life by splitting cutting tips and comes backed by a 3-year warranty. Engineered and calibrated in Oregon, it delivers reliable, workshop-quality sharpening wherever you need it.

Specifications

ASIN	B000BKUY1O
Best Sellers Rank	#32,052 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Power Drill Bit Sharpeners
Date First Available	November 9, 2004
Item Weight	0.01 ounces
Item model number	DD500X
Manufacturer	Drill Doctor
Product Dimensions	13.75 x 5.75 x 11.75 inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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SAR 751

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In stock

Sold byAmazon KSADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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