Hand reamers are a tool that helps to maximise the precision of a drilled hole for applications that require absolute accuracy. They are employed typically after a twist drill has made the hole to within 0.05 and 0.1mm of the required size, the reamer then removes the excess material to meet the sizing requirements.
Hand reamers are typically used with a t-handle wrench which is used to generate torque and feature parallel flutes. There are also reamers that feature a gradual taper towards the cutting tip, these tapered reamers allow for easier initial cutting and can be used to produce tapered holes.
The square part of the shank slots into the wrench and then the cutting edge is inserted into the hole and turned clockwise using the wrench. The spiral design of the flutes help guide the reamer into the hole as it cuts.
The user must ensure that the reamer remains straight whilst rotating the tool to ensure the hole remains straight.
Types of hand reamer
- Straight - These reamers feature a cutting tip that runs straight from shank to tip. They incorporate spiral cutting flutes spaced parallel to each other and are used to ream straight holes.
- Tapered - These reamers feature a gradual taper from the beginning to the end of the cutting section of the tool. Like straight reamers they feature cutting flutes spaced parallel and an equal distance apart, arranged in a spiral. They are mostly used for tapered holes.
Like most cutting tools hand reamers are used to remove stock from a workpiece. Their parallel shaped flutes are designed to be turned in a clockwise direction to even out the inside of a drilled hole.
The torque generated to turn them is created by a t-handle wrench and to maintain accuracy they should be checked after the starting turn to see if the reamer is sitting straight in the hole. Once this check has been carried out rotate the reamer clockwise, in a smooth movement, with a small amount of pressure downwards. The cut should not be reversed.
Add oil to ease the cutting, once cutting is complete remove the reamer by continuing to turn clockwise until the tip has cleared the hole.
A hand reamer is a precision cutting tool used to slightly enlarge and finish drilled holes to an accurate size. It is operated manually and features straight or spiral flutes, making it ideal for achieving smooth, precise hole tolerances in metalworking and engineering applications.
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Company Information
Kunshan Zhiyi Dingli Cemented Carbide Tool Co., Ltd. has built a strong reputation for hand reamer manufacturing from our Suzhou production base. Our hand reamers are crafted for workshops and maintenance teams who demand absolute hole precision. We produce straight, tapered, and spiral flute hand reamer variants in HSS and solid carbide grades for the general engineering, repair and overhaul industries.
Our hand reamers are trusted by maintenance workshops and precision fitting operations in Europe, Southeast Asia, and North America. We continue to expand our product range based on direct customer feedback and evolving industry requirements.
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Packing
1>Put the goods encased with plastic bag or plastic case in wooden box/carton/iron box, etc.
2>Other packing will be accept according to your needs.
FAQ
Q1: What sizes do you stock regularly?
A1: We stock hand reamers from 1mm to 50mm in 0.5mm increments. Larger and inch sizes available on order.
Q2: Can hand reamers be used in machines?
A2: Hand reamers use square shank design for wrench use. For machine use, we recommend our straight shank machine reamer series.
Q3: How much material should be left for hand reaming?
A3: Leave 0.05mm to 0.15mm depending on hole diameter. Too little causes skidding, too much causes poor finish.
Q4: Do you supply tapered reamers for pin holes?
A4: Yes, for Morse taper, metric taper, and standard pin holes. Provide taper angle and small-end diameter when ordering.
Q5: What cutting fluid for reaming steel?
A5: Sulphur-based oil for steel, chlorine-free oil for stainless, and light mineral oil for aluminum.
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