# Micro 100

**Manufacturer:** Micro 100  
**MPN:** `QRB-4901800`

The Micro 100 QRB-4901800 Quick Change Reverse Boring Tool features a solid carbide construction with a 0.5000" shank diameter and 3.5" overall length. It has a minimum bore diameter of 0.490" and a maximum bore depth of 1.800". The tool head is 0.200" long and has a 0.160" projection. The tool's inside corner radius is 0.008" and it has a 0.5000" shank diameter. This tool is designed for reverse boring and is suitable for applications requiring coolant fed enabled shank design.

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Micro 100 |
| Manufacturer name | Micro 100 |
| Manufacturer | Micro 100, Micro 100 Tool Corporation |
| DimensionUnit | inch |
| GraingerSku | 15U180 |
| Extra Product Name | Micro 100 |
| UPC | 728709164167 |
| UnitOfMeasure | EA |
| Weight | 0.25, 0.022046001167587297, 0.0220460011675872978142162 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | US |
| extendedLead | 5 |
| height | 0.69 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 4.75 |
| moq | 1 |
| MPN | QRB-4901800 |
| multiple | 1 |
| qtyInStock | 0 |
| qtyInStockOverride | 0 |
| qtySource | qtyInStockOverride |
| SKU | G8429041 |
| tierMinQty1 | 1 |
| tierPrice1 | 90.43 |
| url | https://www.zoro.com/micro-100-boring-bar-4-12-in-l-carbide-qrb-4901800/i/G8429041/ |
| width | 0.69 |
| EAN | 728709164167 |
| Part Number | QRB-4901800 |
| Model | QRB-4901800 |
| Product Group | BISS |
| Item | Boring Bar |
| Shank Dia | 1/2 in |
| Overall Length | 4-1/2 in |
| Bore Dia | .490" |
| Bore Depth | 1.80" |
| Cutting Direction | Right Hand |
| Material | C2 Micrograin Carbide, Solid Carbide |
| Shank Material | Carbide |
| Application | For Reverse Boring |
| Finish | Uncoated |
| Angle | .160" |
| Radius | 0.0080 in |
| Projection | 0.1600 in |
| Overhang | 2.0400 in |
| Offset Point | 0.2400 in |
| Cutting Application | Reverse Boring |
| Series | QRB |
| Compatible with Product Type | Micro-Quik Tool Holder |
| Features | Coolant Fed Enabled Shank Design;Inside Corner Radius Profile;Split Geometry |
| Center to Cutting Tip | 0.2400 in |
| Finish - Machining | Bright (Uncoated) |
| Max Bore Depth | 1.8000 in |
| Min Bore Dia | 0.4900 in |
| Boring Bar Type | Reverse Boring |
| Measurement System | Fractional Inch |
| Corner Radius | 0.008" |
| Neck Dia | 0.3300" |
| Groove Width | 0.2000" |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G8429041 | 90.43 | 1 | None | 1 |
| Grainger | 15U180 |  |  | None | 1 |
| Raptor Supplies | AA7CZZ | 147.803058 | 1 | None | 1 |
| simsupply.com | ZO-G8429041 | 112.52 | 1 | 3 | 1 |

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