This Brass Pencil Feels Completely Different (Here's Why)
The IJ Instruments Brass PG5 mechanical pencil is a custom small-batch upgrade to the classic Pentel PG5 drafting pencil. In this review and teardown, I explore the machining, brass construction, interchangeable Pentel mechanisms, and everyday carry performance of this precision mechanical pencil. This video is part of my small batch pencil manufacturing series, where I look at unique mechanical pencils built by independent makers. In this video we cover: • The history of the Pentel Graph drafting pencil series • A detailed look at the IJ Instruments brass PG5 • Disassembly and internal mechanism comparison • Converting the pencil to 0.2mm lead using a PG2 mechanism • Custom accessories made by IJ Instruments • Modifying a Spoke Design Model 4 pencil The brass PG5 is a fascinating example of how a classic Pentel drafting pencil can be reimagined through precision machining and small batch manufacturing. If you enjoy mechanical pencils, drafting pencils, everyday carry tools, and pencil collecting, subscribe for more reviews, history, and demonstrations. IJ Instruments Brass PG5 メカニカルペンシルは、クラシックな Pentel PG5 製図用シャープペンシル をベースにした、小ロット生産のカスタムアップグレードモデルです。 このレビューと分解動画では、精密な加工技術、真鍮ボディの構造、交換可能なPentelメカニズム、そして日常携帯(EDC)ツールとしての使い心地について詳しく紹介します。 この動画は、独立系メーカーが製作するユニークなシャープペンシルを紹介する 「小ロット鉛筆製造シリーズ」 の一つです。 この動画では次の内容を紹介します: • Pentel Graph 製図用シャープペンシルシリーズの歴史 • IJ Instruments Brass PG5 の詳細レビュー • 分解と内部メカニズムの比較 • PG2 メカニズムを使った 0.2mm へのコンバージョン • IJ Instruments が製作したカスタムアクセサリー • Spoke Design Model 4 シャープペンシルの改造 Brass PG5 は、クラシックな Pentel 製図用シャープペンシルが 精密加工と小ロット製造 によってどのように新しく生まれ変わるのかを示す、とても興味深い例です。 シャープペンシル、製図用ペン、EDCツール、鉛筆コレクションに興味がある方は、レビュー・歴史紹介・デモ動画のためにぜひチャンネル登録をお願いします。 ================================== TIMESTAMP / タイムスタンプ 00:00 Introduction – The Brass PG5 00:45 Small Batch Pencil Series Overview 01:30 History of the Pentel Graph Series 02:54 Packaging and First Look 03:42 Brass PG5 Design and Specifications 05:00 IJ Instruments and Dr. Lindsay Wilson 07:39 Brass Patina and Everyday Carry Use 08:08 Disassembling the Brass PG5 10:09 Replacing the Pentel Mechanism 11:44 Converting the PG5 to 0.2mm Lead 14:00 Why the Brass PG5 Is Special 15:07 Custom IJ Instruments Accessories 17:49 Final Thoughts on the Brass PG5 ================================== IJ Instruments: https://eyejayinstruments.com/ Thanks to the members of the Knockology Mechanical Pencil Forum: https://forum.knockology.com/ and the Mechanical Pencil Subreddit: r/mechanicalpencils #GreatMechanicalPencils #VintageMechanicalPencils #MechanicalPencilCollection

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