01 — Essential Specifications
Choose with confidence
Essential specifications
The facts that matter most when choosing the right product in this family.
02 -- Materials, Applications & Machines
Working compatibility
Materials, applications & machines
Quickly confirm what the tool can cut, the work it is designed to perform, and the equipment it is intended to run on.
Compatible materials
Recommended workpiece materials
- Carbon Steel
Recommended applications
Typical jobs and operations
- Grinding
- Stock Removal
- Weld Blending
- Surface Preparation
Compatible machines
Equipment and operating methods
- Angle Grinder
03 -- Complete Technical Specifications
Technical data
Complete technical specifications
Open only the groups you need to confirm construction, dimensions, and operating requirements.
Abrasive specifications
Disc / wheel diameter4-1/2"
Diameter — inches4.5″
Grit40
Abrasive grainZirconia
Disc profileHybrid compact (4°)
Disc configurationRegular
Backing materialPlastic backing plate
Supplier box quantity10
Construction & identification
Tool typeFlap Discs
Tool subtypeZirconia Flap Discs
Detailed styleHybrid compact (4°) Regular
Manufacturer seriesPlastic Backed Z3®
Manufacturer part number30142
Dimensions & fit
Size4-1/2" x 5/8"-11 threaded hub
Arbor / mount size5/8"-11 threaded hub
Pack quantity10
Machine & operation
Maximum speed13300 RPM
04 -- Why Choose this series
Series advantage
Why choose the Plastic Backed Z3® series
Plastic Backed Z3®
Z3® zirconia grain is designed for fast, long-lasting grinding in heavy-duty applications. CGW specifies 20% more abrasive material than regular flap discs. The plastic-backed hybrid compact construction compresses the flaps at a 4° angle for edge strength and extended disc life.
05 -- Compatibility & What's Included
Compatibility & contents
Confirm the fit before ordering
The systems, models, and components below come directly from the product’s normalized fit data.
Fit details
Arbor / mount5/8"-11 threaded hub
06 -- Use Notes & Technical Description
Before you use it
Use notes & technical description
Important fit, operating, and care guidance to review before putting the tool to work.
Sold in full-pack multiples of 10 discs. Price is per disc. Match the diameter and mounting to the grinder and follow the manufacturer’s maximum RPM.
View the complete technical description
Z3® Plastic Backed Flap Disc for Steel Grinding
CGW 30142 has a 4-1/2" diameter, 40 grit, 5/8"-11 threaded hub mounting and Regular configuration. The abrasive grain is Zirconia.
Z3® zirconia grain is designed for fast, long-lasting grinding in heavy-duty applications. CGW specifies 20% more abrasive material than regular flap discs. The plastic-backed hybrid compact construction compresses the flaps at a 4° angle for edge strength and extended disc life.
| Manufacturer part number | 30142 |
|---|---|
| Diameter | 4-1/2" |
| Grit | 40 |
| Abrasive grain | Zirconia |
| Disc profile | Hybrid compact (4°) |
| Mount | 5/8"-11 threaded hub |
| Configuration | Regular |
| Backing material | Plastic backing plate |
| Maximum speed | 13,300 RPM |
| Pack quantity | 10 |
Sold in multiples of 10 discs. The displayed price is per disc. Order 10, 20, 30 or another full-pack multiple.
Use a compatible angle grinder and follow the manufacturer’s instructions. The grinder operating speed must not exceed the disc’s maximum RPM.
How ordering works
A clear process from order to delivery
Whether you need one replacement tool or a recurring supply order, every step is designed for clear communication, accurate fulfillment and dependable delivery.
1
Order submitted securely
Your products, quantities and order details enter our system for verification.
Secure submission
2
Confirmation sent
You receive a clear summary of the items and quantities, ready to review or share.
Details confirmed
3
Picking and packing
Our team prepares the correct products and quantities for safe, accurate transportation.
Carefully prepared
4
Tracking provided
As soon as the carrier label is created, the tracking information is sent to you.
Trackable shipment
5
Delivery to your location
Your order travels to the selected address with clear visibility into its progress.
Dependable delivery
Business purchasing
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For distributors, wholesalers, machine shops and contractors: apply for Net 30 terms, email a PDF purchase order or request tailored business pricing.
Canada & United States
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Targeted pricing based on products, quantities and repeat needs
Credit decisions are usually completed in 2–3 business days. No minimum order is required to apply.