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.

ドリルビットシャープナー 500x Drill Doctor

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$561.65

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡️ Drill sharper, work smarter — never settle for dull again!

COMPACT POWERHOUSE - Sleek design fits your workspace while delivering professional-grade results.
EFFORTLESS EDGE RENEWAL - Tool-free diamond wheel swaps mean zero downtime and maximum productivity.
DURABLE DIAMOND GRINDING - Diamond-coated wheel ensures long-lasting, razor-sharp edges every time.
SHARPER BITS FASTER DRILLS - Revive your drill bits with precision sharpening for high-speed steel, carbide, and stone drill bits.
UNIVERSAL FIT ULTIMATE VERSATILITY - Supports standard drill bits from 3/32" to 1/2", including split-point sharpening.

The Drill Doctor 500X is a compact, easy-to-use drill bit sharpener designed for standard drill bits ranging from 3/32" to 1/2". Featuring a diamond grinding wheel and tool-free wheel replacement, it sharpens high-speed steel, carbide, and stone drill bits with precision, including split-point tips. Ideal for professionals and DIY enthusiasts seeking to extend the life and performance of their drill bits with minimal effort.

Specifications

ASIN	B000BKUY1O
Amazon 売れ筋ランキング	DIY・工具・ガーデン - 217,836位 ( DIY・工具・ガーデンの売れ筋ランキングを見る ) ドリルビット研磨器 - 65位
Amazon.co.jp での取り扱い開始日	2012/8/4
おすすめ度	4.6 5つ星のうち4.6 (2,525) var
メーカー	Drill Doctor
メーカーにより製造中止になりました	いいえ
入数	1
商品の重量	0.28 g
商品寸法 (長さx幅x高さ)	34.9 x 14.6 x 29.8 cm
材質	カーバイド, ダイヤモンド
製品サイズ	34.93 x 14.61 x 29.85 cm; 0.28 g
電池付属	いいえ
電池使用	いいえ

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