# Bosch FDX2945040-10 4-1/2-Inch Type 29 40-Grit X-LOCK Flap Disc

Bosch FDX2945040-10 is a 4-1/2-inch Type 29 flap disc with 40-grit zirconia abrasive and an X-LOCK mounting design. Its coarse grit is aimed at metal stock removal, while the quick-change interface is useful for compatible grinders. The listing says it also works with standard 7/8-inch arbor mounts, so confirm the fit for your tool before buying.

- [Original product page](https://best-deals.pro/product/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [View offer](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Bosch
- Model: FDX2945040-10
- Category: Tools & Garden > Power Tools > Sanders & Grinders
- Price: 48.65 USD
- Previous price: 57.23 USD
- Discount: 15%
- Price checked: 2026-11-14T06:38:53.388Z
- Rating: 1 / 5
- Reviews: 3

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- X-LOCK mounting is described as a snap-on fit with release by a lever, without a spanner wrench or flange nuts.
- 40-grit zirconia abrasive is specified for coarse metal grinding and fast stock removal.
- The listing claims backward compatibility with standard 7/8-inch arbor mounts.
- A plastic backing is described as helping reduce the risk of material gouging.

## Pros

- X-LOCK mounting enables tool-free wheel changes on compatible grinders, according to the listing.
- Coarse 40-grit zirconia is suited to removal-focused metal grinding rather than fine finishing.
- The claimed 7/8-inch arbor compatibility may broaden use beyond X-LOCK grinders.

## Specifications

### Identity and abrasive
- Brand: Bosch
- Model: FDX2945040-10
- Disc type: Type 29
- Grit number: 40
- Grit grade: Coarse
- Abrasive material: Zirconia
- Compatible material: Metal
- Maximum rotational speed: 13300 rpm
### Dimensions and installation
- Dimensions listed: 4.5 x 4.5 x 0.1 inches
- Weight listed: 3.52 ounces
- Mounting: X-LOCK
- Compatibility listed: Angle Grinder, Bench Grinder, Die Grinder

## Before you buy

- The listing describes faster changes and less vibration as design benefits, but does not provide independent performance measurements.
- The listing claims backward compatibility with standard 7/8-inch arbor mounts. Confirm the disc and grinder fit before use.

## In the box

- 4-1/2-inch X-LOCK Arbor Type 29 40-Grit Flap Disc (Included)

## A good fit for

- Metal grinding or blending where coarse stock removal is the priority.
- Users with an X-LOCK grinder seeking a tool-free disc swap.
- Buyers who want a Type 29 disc and have verified compatibility with their grinder.

## Less suited to

- Fine finishing that calls for a finer grit.
- Buyers who need confirmed fitment for a specific grinder without checking its mount.

## Customer feedback

The supplied rating evidence is entirely one-star, but comes from only three ratings and includes no written review summary. This is a strongly negative but very small and unexplained signal, so it does not identify a specific problem or establish why customers rated the disc poorly. Consider it alongside the listed 40-grit metal-grinding purpose and verify fitment before choosing it.

## Frequently asked questions

### What abrasive and grit does this disc use?
The listing specifies zirconia abrasive and coarse 40 grit.
### What mounting options are claimed?
It has an X-LOCK mount. The listing also claims backward compatibility with standard 7/8-inch arbor mounts, but check compatibility with your grinder.
### What work is it intended for?
The listing describes it for fast material removal and metal grinding or blending. Its coarse grit is not positioned as a fine-finishing grade.
### What dimensions and weight are listed?
The listing gives dimensions of 4.5 x 4.5 x 0.1 inches and a weight of 3.52 ounces.

## Alternative options

- [EZARC Ceramic Flap Discs 40 Grit, 4-1/2 x 7/8-Inch, Type 29, 10-Pack \| 40 Grit, Ceramic Abrasive, Type 29, for Stainless Steel, Non-Ferrous Metal, Cast Iron and Sheet Metal](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [40 PCS Flap Discs 4 1/2 for Angle Grinder 40 Grit Grinding Discs 4.5 Inch Assorted ...](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [50 Pack 40 Grit Zirconia Flap Discs 4.5" x 7/8" T29 for 4 1/2 Inch Angle Grinder Fl...](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [EZARC Ceramic Flap Discs 40 Grit, 4-1/2" x 5/8"-11, Type 27, 5-Pack \| 40 Grit, Ceramic Abrasive, Quick-Change Trimmable Discs, for Weld Grinding, Beveling, Deburring, Blending and Finishing](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [4-1/2" x 5/8"-11 Zirconia Flap Discs 40 Grit, Type 29 Flap Sanding Discs for Angle ...](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [20PCS Flap Discs 4 1/2 for Angle Grinder 40/60/80/120 Grit Flap Disc High-Density B...](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [Double 10mm Thick Arrow Segments Floor Grinding Disc for Redi Lock Husqvarna Walkbe...](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [50 PCS Flap Disc 40 Grit Sanding Disc 4.5" T29 for Angle Grinder \| Grinding Wheel Zirconia abrasive, heavy-duty grinding & sanding for metal, wood & stainless steel. 7/8" arbor, long-lasting.](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [UPWOOD 10-Pack Ceramic Flap Discs, 4.5-Inch T29 36 Grit \| 7/8" Arbor for Angle Grinders, Ceramic Abrasive Disc for Stock Removal, Weld Grinding, Deburring and Surface Preparation](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [EZARC Zirconia Flap Discs 40 Grit, 4-1/2 x 7/8-Inch, Type 29, 10-Pack \| 40 Grit, Zirconia Abrasive, Type 29, for Stock Removal, Weld Grinding, Deburring, Sanding and Rust Removal](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [Zirconia Flap Discs 40 Grit, 4.5" x 7/8", 10 Pack Type 29 \| 4 1/2 for Angle Grinder...](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [EZARC Aluminum Oxide Flap Discs 40 Grit, 4-1/2 x 7/8-Inch, Type 29, 50-Pack \| 40 Grit, Aluminum Oxide Abrasive, Type 29, for Wood Finishing, Metal Sanding, Rust Removal and Deburring](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)

## Add-ons

- [Bosch TCWX1S450P10 4-1/2 in. X-Lock® Metal/Stainless Steel Cutting Wheels - 10 Pack, 60 Grit, Type 1/41](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)
- [Swozzto XLOCK to 5/8"-11 Thread Adapter Kit with Quick Change Nut \| Suitable for XLOCK Angle Grinders, Convert and Install Saw Blades, Polish Discs](https://best-deals.pro/visit/bosch-fdx2945040-10-x-lock-type-29-flap-disc)

## Images

![Bosch FDX2945040-10 4-1/2-Inch Type 29 40-Grit X-LOCK Flap Disc — 1](https://best-deals.pro/i/37Sv6sMl0zS5ssjRKwHxr0gRNYfh-YHUckgLNwS_YZhxIUfuIUlnx2Ufo3rb5i2sfka1iqmrpudntxOpZDol1z3SHxbnCZUL_lrEGTdO6T-8Fr4yBe3z.jpg)

![Bosch FDX2945040-10 4-1/2-Inch Type 29 40-Grit X-LOCK Flap Disc — 2](https://best-deals.pro/i/0E0Ejcwf_GK9_If6rN1vvus8Wm78HgZnbnn5ot93VJM5Vz-KfH0TwjLE_DxXWjGjy54jMPVtNriMLM7x543DWKAYUwmbSiE43EG9YjeaU4chd7q3GDxl.jpg)

![Bosch FDX2945040-10 4-1/2-Inch Type 29 40-Grit X-LOCK Flap Disc — 3](https://best-deals.pro/i/3j1g0eQnikJPZrfswZUbXWBDvurbw4d3v1Koq9jiVjBHWTqFwQWWvZqvYhzt1eKHiWEzjmMdx7Z_ccCvkWGjYoJB8GgKWqROfMs5Vrotien4b3hq0pZD.jpg)

![Bosch FDX2945040-10 4-1/2-Inch Type 29 40-Grit X-LOCK Flap Disc — 4](https://best-deals.pro/i/iZPVRFxqEcRhURWMH49CBN89VRXV__wAV28iSucAdSSejkzqM2ZuvDhdFW6lo7DTBpEc2T1rZ5uGESCep7NMpTfddWBM1l-m0K24DT_cfH43mMBIJ8ow.jpg)

![Bosch FDX2945040-10 4-1/2-Inch Type 29 40-Grit X-LOCK Flap Disc — 5](https://best-deals.pro/i/Xc6Vg6qHc54PkPPCVPXYAERxp7MEeKSvgVa3fPa5emUucCRI8ww0fLac-cbmsM9iHRMqsz4fpqdiT-t0zCFS4Dl4ar8HuiYbh9ACUqCS7mbmrJg68UIX.jpg)