Your Trusted Ball Lock Punch Manufacturer
GUNRI manufactures custom ball lock punches to your exact drawings, materials, and tolerance requirements. POP IN / POP OUT quick-change retention keeps the die on the press, slashes downtime, and lets you regrind worn punches without breaking down the die set.
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What Are Ball Lock Punches?
A ball lock punch is a stamping punch held in its retainer by a spring-loaded steel ball that seats into a groove (the ball seat) on the punch shank. That wedge-principle lock keeps the punch firmly against its backing during the stroke, yet releases instantly when you depress the ball.
That is the whole trick behind the POP IN / POP OUT experience. The operator presses the ball, slides the worn punch out, snaps a fresh one in, and keeps running. No bolts, no wrenching, and usually no need to lift the die off the press. Ball lock punches are the workhorse quick-change option for stamping jobs where changeover speed matters more than micron-level tolerance.
Want to know more? Read How Does a Ball Lock Punch Work and What Are Its Main Advantages? for a detailed breakdown.
Custom Punch & Component Offerings
Select your desired component style or send us your supplier part numbers for direct equivalent manufacturing.
Standard Round Ball Lock Punches
Precision-ground standard round ball lock punches engineered for tool-free pop-in, pop-out replacement on press.
- Shank Range: 6mm – 32mm
- Materials: SKD11, HSS M2
- Tolerance: Shank h6 / Point +/-0.005mm
Heavy-Duty Ball Lock Punches
Built for heavy plate stamping, these heavy duty ball lock punches feature enlarged shanks for extreme impact.
- Shank Range: 13mm – 38mm
- Application: Thick Plate Stamping
- Feature: High-Impact Resistance
Ejector Ball Lock Punches
Eliminate scrap sticking with our ball lock ejector punches for slug pulling, featuring internal spring-loaded pins.
- Internal Feature: Built-in Spring & Pin
- Core Benefit: Prevents Slug Pulling
- Replacement: Serviceable Pins
Shaped & Profiled Ball Lock Punches
Custom-machined profiled ball lock punches including oblong, rectangle, and complex geometry with anti-rotation flats.
- Profiles: Oblong, Square, Oval
- Machining: Wire EDM & PG Optical
- Orientation: Precision Ball Flat
Carbide Ball Lock & Die Punches
Maximize die life with ultra-wear-resistant tungsten carbide ball lock punches for micro-electronics stamping.
- Grades: CD-650, KG7, Sumitomo AF1
- Hardness: Up to 88-92 HRA
- Ideal For: High-Volume & Abrasive Runs
Coated High-Wear Ball Lock Punches
Reduce galling with TiCN coated ball lock punches. Surface treatments drastically extend punch service life.
- Coatings: TiCN, TiN, DLC, AlTiN
- Surface Hardness: >3000 HV
- Advantage: Anti-Galling & Low Friction
Ball Lock Retainers & Accessories
One-stop sourcing for single and multi-position ball lock punch retainers, backing plates, springs, and release tools.
- Types: End-Lok, Multi-Hole
- Standards: ISO 10071 & NAAMS
- Accessories: Release Keys / Springs
Custom Ball Lock Punches Per Print
Need special step-down dimensions, custom angles, or ultra-tight tolerances? We fabricate custom ball lock punches per print.
- Customization: Step-Down, Special R
- CAD Formats: STEP, IGES, DWG, PDF
- Turnaround: 5-7 Business Days
Engineering Capabilities & Precision Standards
GUNRI delivers custom punch and die components with rigorous quality control, state-of-the-art optical grinding equipment, and certified raw materials.
Precision Tolerances
- Outer Diameter: +/-0.001 mm
- Concentricity: <= 0.002 mm
- Surface Finish: Ra 0.05 um
- Point Profile: PG Optical Grinding
Raw Material Selection
- Tungsten Carbide: CD-650, KG7
- Powder HSS: ASP23, ASP60
- Alloy Tool Steel: SKD11 (D2)
- High Speed Steel: SKH51 (M2)
PVD Coating Options
- TiCN (Titanium Carbonitride)
- TiAlN / AlTiN (High Heat)
- DLC (Diamond-Like Carbon)
- Anti-Galling Treatments
Quality Assurance
- CMM 3D Inspection Reports
- Mitutoyo Optical Measuring
- Hardness Testing (HRC/HV)
- 100% Pre-Shipment Inspection
Why Choose GUNRI Ball Lock Punches?
We are an OEM factory delivering custom ball lock punches to any standard. With lower pricing and guaranteed quality, our replacements can directly substitute Misumi, Dayton, and NAAMS standard parts, including HJB, BPH, EBJ, and more.
POP IN / POP OUT
Seconds to switch, no die teardown.
Die Stays in Press
Regrind without breaking down the set.
Reduced Downtime
Fewer line stops, more running hours.
Custom to Drawing
Any size or profile, imperial or metric.
+/-0.002 Tolerance
Ground where the job demands it.
100% Inspection
Checked before dispatch.
1pc No MOQ
Prototype or volume, your call.
Fast Quotation
Quick pricing from your drawing.
Application Areas for Precision Punches & Dies
Our high-precision custom punches and die components serve critical metal stamping and forming industries worldwide.
Automotive Stamping
Heavy-duty ball lock punches for body-in-white (BIW), structural frames, and thick-plate brackets.
Electronics & Connectors
Micro carbide punches engineered for high-speed terminal stamping and micro-pin production.
Medical Device Dies
Ultra-smooth mirror finish (Ra 0.05) carbide punches for precision surgical and diagnostic parts.
Motor Lamination
High-wear-resistant powder metal and tungsten carbide punches for silicon steel lamination dies.
Frequently Asked Questions
One Minute Get Free Quotation for Your Project
We are more than a supplier. When you contact us, you receive practical advice and customized support from engineers who work with stamping tooling every day – saving you time, cost, and effort.
Send Your Drawing for a Ball Lock Punch Quote
Provide your CAD or PDF drawing, material grade, and quantity. We respond with pricing and process recommendations to match your stamping line.
Direct Factory Email: milla@gunri.com.cn
Request a Ball Lock Punch Quote