# 1-2-3 blocks

*/Products/1-2-3_blocks*

Gage block set

## Product Bo M

**Input To**:
- [Machine Setup](/Processes/Machine_Setup)
- [Dimensional Inspection](/Processes/Dimensional_Inspection)
**Summary**: A precision-ground steel setup block measuring nominally 1 by 2 by 3 inches with reamed and threaded holes on each face, used to position, support, and square workpieces on machine tables and inspection surfaces. It is a finished tooling good rather than a part of a larger assembly.
**Output Of**:
- [Precision Grinding](/Processes/Precision_Grinding)
- [Heat Treating](/Processes/Heat_Treating)
**Components**:
- Name: Tool Steel Blank · Quantity Note: the hardened body machined to the 1-2-3 dimensions · Required Input: Alloy Steel Bar
**Packaged In**:
- [Foam Lined Case](/Products/Foam_Lined_Case)
- [Corrugated Shipping Box](/Products/Corrugated_Shipping_Box)
**By Product Of**:
- [Steel Machining Chips](/Products/Steel_Machining_Chips)
**Physical Good**: true
**Produced With**:
- [Surface Grinder](/Products/Surface_Grinder)
- [Computer Numerical Control Mill](/Products/Computer_Numerical_Control_Mill)
- [Heat Treatment Furnace](/Products/Heat_Treatment_Furnace)
**Consumes To Make**:
- [Cutting Fluid](/Products/Cutting_Fluid)
- [Grinding Wheel](/Products/Grinding_Wheel)
**Has Measurement**:
- [Dimensional Tolerance](/Metrics/Dimensional_Tolerance)
- [Surface Flatness](/Metrics/Surface_Flatness)
- [Parallelism](/Metrics/Parallelism)
- [Surface Hardness](/Metrics/Surface_Hardness)
**Transforms Into**:
- [Machinist Setup Kit](/Products/Machinist_Setup_Kit)

## Neighborhood

### Parent

- [Gage block set](/Products/Gage_block_set) — parent · Products

### Siblings

- [Angle gauge blocks](/Products/Angle_gauge_blocks) — siblings · Products
- [Gage block sets](/Products/Gage_block_sets) — siblings · Products
- [Gage blocks](/Products/Gage_blocks) — siblings · Products
- [Gauge blocks](/Products/Gauge_blocks) — siblings · Products
- [Marking blocks](/Products/Marking_blocks) — siblings · Products
- [Parallel blocks](/Products/Parallel_blocks) — siblings · Products
- [Plane-parallel gauge blocks](/Products/Plane-parallel_gauge_blocks) — siblings · Products
- [Precision gauges](/Products/Precision_gauges) — siblings · Products
- [V blocks](/Products/V_blocks) — siblings · Products
- [Gage Blocks And Indicators](/Products/Gage_Blocks_And_Indicators) — siblings · Products
- [Gage Blocks and Plug Gages](/Products/Gage_Blocks_and_Plug_Gages) — siblings · Products
- [Gauge Block Set](/Products/Gauge_Block_Set) — siblings · Products
- [Gauge Blocks And Pin Gauges](/Products/Gauge_Blocks_And_Pin_Gauges) — siblings · Products
- [Gauge Blocks and Dial Indicators](/Products/Gauge_Blocks_and_Dial_Indicators) — siblings · Products
- [Setup Gauge Blocks](/Products/Setup_Gauge_Blocks) — siblings · Products

### Who uses this

- [Tool and Die Makers](/Occupations/Tool_and_Die_Makers) — uses · Occupations
- [Lathe and Turning Machine Tool Setters, Operators, and Tenders, Metal and Plastic](/Occupations/Lathe_and_Turning_Machine_Tool_Setters,_Operators,_and_Tenders,_Metal_and_Plastic) — uses · Occupations

### Output of

- [Heat Treating and Quenching](/Processes/Heat_Treating_and_Quenching) — output of · Processes
- [Precision Grinding](/Processes/Precision_Grinding) — output of · Processes

### Transforms into

- [Machine Tool Setup Kit](/Products/Machine_Tool_Setup_Kit) — transforms into · Products

### Packaged in

- [Corrugated Shipper](/Products/Corrugated_Shipper) — packaged in · Products
- [Foam Lined Case](/Products/Foam_Lined_Case) — packaged in · Products

### Consumes

- [Grinding wheels](/Products/Grinding_wheels) — consumes · Products
- [Cutting Coolant](/Products/Cutting_Coolant) — consumes · Products

### Produced with

- [Surface grinding machines](/Products/Surface_grinding_machines) — produced with · Products
- [Heat Treatment Furnace](/Products/Heat_Treatment_Furnace) — produced with · Products
- [Computer Numerical Control Mill](/Products/Computer_Numerical_Control_Mill) — produced with · Products

### Problems this exposes

- [hole and thread burr from use marring the reference faces](/Problems/hole_and_thread_burr_from_use_marring_the_reference_faces) — exposes problem · Problems
- [parallelism/squareness tolerance drift below 0.0002in degrading setup accuracy](/Problems/parallelism%2Fsquareness_tolerance_drift_below_0.0002in_degrading_setup_accuracy) — exposes problem · Problems
- [surface rust pitting the ground precision faces in shop humidity](/Problems/surface_rust_pitting_the_ground_precision_faces_in_shop_humidity) — exposes problem · Problems
- [matched-pair dimensional consistency between blocks](/Problems/matched-pair_dimensional_consistency_between_blocks) — exposes problem · Problems
- [flatness/parallelism tolerance holding after hardening and grinding](/Problems/flatness%2Fparallelism_tolerance_holding_after_hardening_and_grinding) — exposes problem · Problems
- [rust prevention on the precision-ground steel faces](/Problems/rust_prevention_on_the_precision-ground_steel_faces) — exposes problem · Problems

### Measured by

- [Surface Hardness](/Metrics/Surface_Hardness) — measured by · Metrics
- [Parallelism](/Metrics/Parallelism) — measured by · Metrics
- [Surface Flatness](/Metrics/Surface_Flatness) — measured by · Metrics
- [Dimensional Tolerance](/Metrics/Dimensional_Tolerance) — measured by · Metrics

### Input to

- [Dimensional Inspection](/Processes/Dimensional_Inspection) — input to · Processes
- [Machine Setup](/Processes/Machine_Setup) — input to · Processes

### By product of

- [Steel Machining Chips](/Products/Steel_Machining_Chips) — by product of · Products

### Requires input

- [Alloy Steel Bar](/Products/Alloy_Steel_Bar) — requires input · Products

### Composed of

- [Tool Steel Blank](/Products/Tool_Steel_Blank) — composed of · Products