Punches with Key Grooves
Anti-Rotation Keyway Locking for Shaped Profiles. Browse 8 products from MISUMI and DAYTON with configurable dimensions and same-day shipping on standard catalog items.
Punches with Key Grooves (8 Products)
Punches with Key Grooves Single-Stepped Shank
Punches with Key Grooves with a single-stepped shank and key groove mounting for stable punch alignment. SKD11 equivalent or SKH51 options available. Request...
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TiCN Coated Punches with Key Grooves
TiCN coated punches with key grooves featuring a single-stepped shank with key groove mounting for secure alignment in die sets. Request a quote.
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Punches with Key Grooves Single-Stepped Shank
Punches with Key Grooves Single-Stepped Shank. Designed for keyed mounting with WPC or HW coating options and high-performance steel. Request a quote.
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SKD11 Steel Punches with Key Grooves Single-Stepped Shank
SKD11 steel punches with key grooves and single-stepped shank for secure alignment in tooling. Key-groove mounting improves stability. WPC option available. ...
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Key Groove Punches with DLC Coating WPC Treatment
Key Groove Punches with DLC Coating WPC Treatment designed for punch applications. Built for controlled fit at key-groove mounting; request a quote.
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Punches with Key Grooves - RW Coating
Punches with Key Grooves - RW Coating for positive shank alignment. Single-stepped shank with key groove mounting improves repeatable positioning in dies.
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RX Coating Punches with Key Grooves
RX Coating punches with key grooves for precision machining. Advanced surface treatment improves wear and corrosion resistance for longer tool life. Request ...
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RP Coated Punches with Key Grooves
RP coated punches with key grooves with Al-Cr based coating and Alpha treatment improve wear resistance and adhesion for longer punch life. Reduce mold maint...
View DetailsKeyway vs Dowel Hole: Anti-Rotation Method Comparison
Non-round punches (D-shape, square, oblong, custom profiles) must be locked against rotation in the punch plate. Two methods exist: a ground keyway (flat) on the shank, or a cross-drilled dowel pin hole. The choice depends on profile complexity, positional accuracy, and maintenance requirements.
| Dimension | Key Groove (Keyway Flat) | Locating Dowel Hole |
|---|---|---|
| Locking Mechanism | Ground flat on shank engages a key set screw in punch plate | Cross-drilled hole accepts a dowel pin spanning punch-to-plate |
| Angular Accuracy | +/- 0.5 degrees (limited by flat-to-bore clearance) | +/- 0.1 degrees (pin-hole interference fit) |
| Shank Weakening | Minimal (flat depth typically 0.3-0.5mm) | Moderate (hole diameter typically 20-30% of shank diameter) |
| Ease of Removal | Loosen set screw, slide out | Must press out dowel pin first |
| Best For | Standard D-cuts, moderate accuracy needs | Precision profiles, zero-rotation tolerance |
| Cost | Lower (simple grinding operation) | Higher (cross-drilling + reaming) |
Keyway Anti-Rotation Mechanics
How Keyway Locking Works
A flat is ground along one side of the cylindrical shank, typically 0.3-0.5mm deep and running the full shank length. When installed in the punch plate bore, a hardened set screw in the plate presses against this flat surface, preventing rotation. The torque resistance equals: T = F x r, where F is the set screw clamping force and r is the shank radius. For a typical M6 set screw at 5 Nm, this provides approximately 15-20 Nm of anti-rotation torque.
Keyway Dimensional Standards
MISUMI and DAYTON follow JIS B 5012 keyway specifications: flat width = 30-40% of shank diameter, flat depth = 0.3-0.5mm for standard profiles. The keyway position (angular orientation relative to the punch profile) is controlled to +/-0.5 degrees during grinding. For tighter angular control, specify high-precision grinding (+/-0.1 degrees) at additional cost.
About Punches with Key Grooves
Key groove punches feature a precision-ground flat (keyway) along the shank for anti-rotation locking. When installed in the punch plate, a set screw engages the flat to prevent rotational movement, essential for non-round punch profiles (D-shape, square, oblong). This 8-product range covers standard JIS shapes in SKD11 and SKH51 materials with keyway dimensions per JIS B 5012. Available from MISUMI and DAYTON.
Application Scenarios
D-Shape & Square Piercing
Non-round hole profiles (D-shape, square, rectangular) in sheet metal parts for electrical connectors and mounting features.
Why key groove punches fit: The ground keyway flat locks the punch profile orientation during installation. Standard +/-0.5 degree accuracy is sufficient for most connector and mounting hole applications.
Shaped Slot Punching
Long, narrow slots (L/W ratio >3:1) in transformer laminations and motor stator sheets require anti-rotation locking to maintain slot alignment.
Why key groove punches fit: The keyway prevents gradual rotation that would cause slot misalignment over production runs. Easy removal via set screw allows quick replacement when the narrow punch tip wears.
Frequently Asked Questions
How does a key groove compare to a dowel hole for anti-rotation?+
What are the machining tolerances for the keyway flat?+
Do key groove punches require specialized retainers?+
Can you provide custom grinding for shaped key groove punches?+
Engineering Resources
Need a Custom Quote?
Send your specifications and receive a quote. MOQ: 1 piece. Custom dimensions available.