duMONT Minute Man 44498 No.70 Metric Keyway Broach Set
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The duMONT Minute Man No. 70 Metric Keyway Broach Set (Part #44498) is a complete metric keyway broaching system manufactured in Deerfield, MA, USA, comprising high-speed steel (HSS) push-type broaches, corresponding guide bushings, and shims for cutting metric keyways per DIN 6885 standards in hubs, sprockets, gears, and pulleys. The set is designated No. 70 (metric series) and includes broaches and bushings in metric sizes — visible individual items in the photos include 4mm-B-1, 5mm-B-1, 6mm-C, and 8mm-C keyway broaches with their respective collared guide bushings — all stored in a fitted foam-lined hardwood wooden case with a metal clasp for organization and protection. Each broach is used with an arbor press or hydraulic press; the guide bushing locates in the pre-drilled bore of the workpiece to align and support the broach during the push stroke, ensuring accurate keyway geometry. This set is offered as new — other condition, with full complement of broaches, bushings, and case as shown in the photographs.
Product Specifications
| Brand | duMONT (The duMONT Company) |
| Part Number | 44498 |
| Series | Minute Man No. 70 Metric |
| Standard | Metric (DIN 6885) |
| Broach Sizes Included | 4mm, 5mm, 6mm, 8mm (B & C keyway types) |
| Keyway Types | Type B-1, Type C |
| Broach Material | High-Speed Steel (HSS) |
| Operation Type | Push-type (arbor press or hydraulic press) |
| Country of Origin | USA |
| Storage | Fitted foam-lined hardwood wooden case w/ latch |
| Condition | New — other |