Reaming is similar to counter boring in that reaming removes the final material from a pre-bore. However, reaming is carried out to obtain a precise hole tolerance. Reamers remove less stock than counter boring tools, but they can be operated at much higher feeds and speeds.
Our indexable reamers are available for both single tube and double tube systems. Additionally American Heller stocks a complete line of brazed or disposable reamers for small diameter bores. Follow this link for more information on our disposable line of reamers.
Consider these unique advantages of American Heller's BTA Indexable Reamers.
- Penetration rates two to ten times faster than conventional reamers.
- Depths of cut up to .096" per side.
- Can be used on all types of machines such as lathes, mills, machining centers, transfer machines, deep hole drilling machines and others.
- Reamers furnished with a single precision ground indexable insert and two reversible carbide pads starting as small as 1/2" diameter.
- Reamers are self-piloting and will not follow an existing hole, even for bore depths up to 100 times the tool diameter.
- Precision ground inserts insure superior finishes, straightness and tolerances.
- Inserts in stock either coated or uncoated for reaming alloy steels, cast iron, stainless, space age and exotic metals.
- Inserts produced in light cut or heavy cut versions - light cut for superior bore finishes.
- Only three different inserts required to cover the complete range from 1/2" diameter and up.
- Produced in either push or pull boring versions, either I.D. or O.D. chip exhaust.
Note: Hole tolerances, concentricity, surface finish and runout will be affected by a number of factors including machine condition, alignment, boring bar straightness, bushing size, etc.
General Information
American Heller's reaming tools are available in a variety of styles including:
- Single Tube Chips Forward
- Single Tube Chips Back
- Double Tube Chips Forward
- Double Tube Chips Back
The figure below illustrates the "single tube chips forward" design. This design can only be used for through hole drilling since the chips are flushed forward through the workpiece pre-bore. In this design a coolant adapter is used to force coolant through the ID of the boring bar to
the tool body. The coolant exits the tool body through coolant holes and then flushes the chips out through the workpiece.
The next figure illustrates a "single tube chips back" design. This design is similar to counter boring with the exception that there is only light stock removal. The chips back design may be used with either blind holes or through holes. If the workpiece contains a through hole, one end of the workpiece must be sealed to prevent the chips from flushing forward. A pressure head is used to force the coolant to the tool's cutting edge. The chips are then exhausted through the ID of the boring bar.
The double tube system may also be used with American Heller's reaming tools. Both "chips forward" and "chips back" designs are available. Similar to the single tube system, the chips forward design may only be used with through holes while the chips back designed may be used with through and blind holes. The figure below illustrates a chips forward design in which the chips are flushed out through the workpiece.
The following table depicts our standard line of indexable reamers for the single tube system. These tools may be designed for either chips forward or chips back coolant exhaust. Click here for a parts diagram.
| .500-.610 |
1N |
No Cartridge Used Under .985" Dia. |
R11L/.012" |
R11H/.032" |
FL-2 |
| .611-.707 |
CN |
| .708-.866 |
P/A |
FL-4 |
| .867-.984 |
2 |
| .985-1.181 |
3 |
11AF |
FL-6 |
| 1.182-1.456 |
5MR |
| 1.457-1.850 |
8 |
16AF |
R16L/.024" |
R16H/.060" |
FL-8 |
| 1.851-2.196 |
13 |
FL-10 |
| 2.197-2.969 |
13 |
20AF |
R20L/.038" |
R20H/.096" |
FL-14 |
| 2.970-3.516 |
16C |
FL-18 |
| 3.517-4.891 |
18A |
Other sizes quoted on request
* Depth of cut per side
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