# Boring Bar, Reverse Boring, AlTiN, 0.2400 in, Micro-Quik Tool Holder

**Manufacturer:** Micro 100  
**MPN:** `QRB-4901250X`

The Micro 100 QRB-4901250X Quick Change Reverse Boring Tool features a solid carbide tool with an AlTiN coating. It has a minimum bore diameter of 0.490 inches (12.5 mm) and a maximum bore depth of 1.250 inches (31.8 mm). The tool head length is 0.200 inches (5.08 mm) and the projection is 0.160 inches (4.10 mm). The tool radius is 0.008 inches (0.20 mm) and the shank diameter is 0.5000 inches (12.7 mm). The overall length is 3 inches (76 mm).

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Micro 100 |
| Manufacturer name | Micro 100 |
| Manufacturer | Micro 100, Micro 100 Tool Corporation |
| CategoryId | 6031 |
| CategoryIdL1 | 2 |
| CategoryIdL2 | 6049 |
| CategoryIdL3 | 6031 |
| CategoryL1 | Tools & Machining |
| CategoryL2 | Cutting Tools |
| CategoryL3 | Indexable Tools |
| CategoryL4 | Indexable Boring Bars |
| DimensionUnit | inch |
| GTIN | 728709164136 |
| GraingerSku | 15U177 |
| UPC | 728709164136 |
| UnitOfMeasure | EA |
| Weight | 0.23, 0.24999999979035234, 0.249999999790352350, 0.25 |
| WeightUnit | lbs |
| cali_prop65_orglabel | False |
| cali_prop65_whtlabel | False |
| countryOfOrigin | US |
| height | 0.69 |
| jsonUrlData | 924526ffbdad25e5923b |
| length | 3.75 |
| moq | 1 |
| MPN | QRB-4901250X |
| multiple | 1 |
| qtyInStock | 0 |
| qtyInStockOverride | -2 |
| SKU | G8322115 |
| snippet | Boring Bar, Reverse Boring, AlTiN, 0.2400 in, Micro-Quik Tool Holder |
| tierMinQty1 | 1 |
| tierPrice1 | 103.99 |
| url | https://www.zoro.com/micro-100-boring-bar-3-12-in-l-carbide-qrb-4901250x/i/G8322115/ |
| width | 0.69 |
| EAN | 728709164136 |
| Part Number | QRB-4901250X |
| Model | QRB-4901250X |
| Product Group | BISS |
| Overall Length | 3-1/2 in |
| Shank Dia | 1/2 in |
| Bore Dia | .490" |
| Bore Depth | 1.25" |
| Radius | 0.0080 in |
| Min Bore Dia | 0.4900 in |
| Max Bore Depth | 1-1/4 in |
| Neck Dia | 0.3300" |
| Groove Width | 0.2000" |
| Corner Radius | 0.008" |
| Item | Boring Bar |
| Cutting Direction | Right Hand |
| Material | C2 Micrograin Carbide, Solid Carbide |
| Shank Material | Carbide |
| Angle | .160" |
| Application | For Reverse Boring |
| Finish | AlTiN Coated |
| Projection | 0.1600 in |
| Features | Coolant Fed Enabled Shank Design;Inside Corner Radius Profile;Split Geometry |
| Series | QRB |
| Compatible with Product Type | Micro-Quik Tool Holder |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| Zoro | G8322115 | 103.99 | 1 | None | 1 |
| Grainger | 15U177 |  |  | None | 1 |
| Raptor Supplies | AA7CZW | 150.350616 | 1 | None | 1 |
| AmazonUNK | B00Q8NNQUE | 145.05 | 1 | None | 1 |
| AmazonTP | B00Q8NNQUE | 145.05 | 1 | None | 1 |
| AmazonSC | B00Q8NNQUE | 35.88 | 1 | None | 1 |
| sustainablesupply.com | C1444279 | 128.63 | 1 | None | 1 |
| simsupply.com | ZO-G8322115 | 123.17 | 1 | 3 | 1 |

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Structured data: `/python/html6/product/500/174500000/174878000/part_--QRB4901250X---Micro100--2df4addcde.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp