Cleveland
Cleveland C42189 2-Flute HSS Ball Nose Double End Mill HD-2B Bright
Double-ended HSS ball-nose cutter mills slots and contours in a single tool
- 25 in ball nose cuts smooth 3-D contours
- High-speed steel withstands heat in general milling
- Uncoated bright finish suits dry machining setups
- Double-ended design provides two cutting ends per tool
- Cleveland C42189 model identifies the exact specification
Cleveland C42189 Double End Mill
The Cleveland C42189 is a 2-flute HSS ball nose double end mill designed for milling operations requiring a rounded profile. It suits machinists and maintenance technicians who need a bright finish tool for general-purpose cutting in softer materials. The uncoated high-speed steel construction provides a cost-effective option for low-to-medium production runs. Buyers needing coated tooling for high-temperature alloys or abrasive composites should select a different product.
Thermals noise and power draw
High-speed steel generates moderate heat during cutting compared to carbide alternatives, requiring appropriate cutting fluid or air blast for temperature management. The uncoated surface increases friction, which can elevate cutting zone temperatures if speeds and feeds are not optimised. Noise levels depend entirely on the machine spindle, workpiece rigidity, and clamping security rather than the tool itself. Power consumption is determined by the milling machine drive and the chosen cutting parameters.
Behaviour under sustained load
During extended cuts, the uncoated HSS flutes will experience gradual wear at the ball nose radius, leading to dimensional changes in the finished profile. The double-end design allows the tool to be reversed once the first end dulls, effectively doubling the available cutting life. Chip evacuation from the ball nose pocket can become difficult in deep slots, potentially causing re-cutting and accelerated edge degradation. Rigid setups and conservative feed rates help maintain consistent performance over long periods.
Highlights
- 25 in ball nose cuts smooth 3-D contours
- High-speed steel withstands heat in general milling
- Uncoated bright finish suits dry machining setups
- Double-ended design provides two cutting ends per tool
- Cleveland C42189 model identifies the exact specification
Specifications
| Brand | CLEVELAND |
|---|
Questions about this item
How do I install the 0.25 in ball nose end mill in my collet without damaging the flutes?
Insert the shank fully into a clean 0.25 in collet, tighten evenly, and avoid touching the cutting edges during handling to prevent nicks.
When will the high-speed steel cutting edges need replacement under normal milling?
Replace the tool when the ball nose radius shows visible wear or when surface finish degrades, as uncoated HSS dulls faster than coated alternatives.
What limits continuous cutting time before the uncoated tool overheats?
Heat buildup in the high-speed steel body is the first limit; use pecking cycles and adequate chip evacuation to manage temperature during sustained cuts.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
