This section provides an overview for straight reamers as well as their applications and principles. Also, please take a look at the list of 10 straight reamer manufacturers and their company rankings.
Table of Contents
A straight reamer is a blade shape used in reaming (high-precision hole finishing). A spiral reamer is a similar blade used for the same process.
The reaming process creates a hole with a predetermined dimension and a small diameter discrepancy by implementing high-precision hole finishing after the preparation hole is drilled.
These reamers may be used for either manual (hand) reaming or reaming by machine equipment.
The blade materials used vary and are available from several manufacturers.
They vary in material, shank, and tooth length, and cost anywhere from a few dollars to 150 dollars. In recent years, there are reamers often available on auction sites at relatively low prices.
For example, when using a hand reamer, a pre-hole is first drilled after confirming the hole dimensions to be finished. At this time, it is advisable to select the allowance for high-precision hole finishing, taking into consideration the reamer diameter and workpiece material.
Next, the reamer is passed through the pre-hole. High-precision hole finishing is done on the downhole. To make sure that the reamer passes straight through, it is sometimes necessary to check that it is perpendicular to the workpiece while working with a square or similar tool.
Using a hand reamer requires experience, and the speed of rotation and feed must be constant during high-precision hole finishing. This is because it affects the workpiece's workmanship.
This reamer has the appearance of a drill used on a drilling machine that drills holes with straight lengthwise teeth.
High-precision hole finishing is achieved by drilling a hole with a slightly smaller diameter dimension than the finished hole dimension and passing this reamer along the downhole, so that the allowance for the reamer is removed in the cutting process, resulting in a highly accurate finished condition.
Compared to drilling with a drill on a drilling machine, the difference in allowance and blade shape allows for a more accurate finish, but there are some points to note.
Since the blade is straight, the finished surface may be slightly cracked. This also happens in machining, and can be affected by insufficient clamping force, the quality of the pre-drilled hole, the oil used during cutting, and the speed of rotation and feed rate. In the case of manual machining, sufficient experience is required.
The shape of the teeth differ among spiral reamers, which are sometimes used for similar machining, and the way the facets are produced differs. Spiral reamers have twisted teeth, and the facets during machining are directed from the tip of the machining section toward the entrance of the hole in the workpiece.
If you wish to select and obtain a new straight reamer, you can choose from a variety of products from different companies after confirming the workpiece to be machined.
*Including some distributors, etc.
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