Circuit Beveler Model CB-01

1. ApplicationsCircuit Beveler Model CB-01 is a pneumatic hand tool. This tool operates with two disposable indexableinserts, and can chamfer straight and curved edges, and hole edges on mild steel products such asmachined parts and molds.

2. The design purpose of Model CB-01Chamfering burrs on workpieces such as machined parts and molds reduces operators’ hand injurieswhile they handle the workpieces. Moreover, this makes them look fine. Due to these reasons thechamfering work on the workpieces is increasing at the site of processing. The big guide plate of theexisting Model CB-02 has restricted chamfering work and brought about numerous requests for adownsized model from customers. Model CB-01 is completely downsized, and its motor performance isincreased. In addition its product design is examined from all the possible angles.
3. Specifications

CB-01

CB-02（Existing Model）

0.60.59

Air Consumption

m³/min 0.15

0.4Free Speedmin⁻¹

28,00013,000Chamfering Capacitymm

Mild Steel

Minimum Plate Thicknessmm

10Minimum Radiusmm

45°1.5(Max Chamfering capacity isreduced to 0.5C when platethickness is 1.5 mm)3R

Minimum Hole Diameter for Chamferingmm

6.8 dia.

12 dia.

Minimum Chamfering Depthmm

620kg

0.51.8ModelAir PressureMＰa

Chamfer Angle

Mass (Weight)

10C-1C

0C-2C,2R45°

6R

Standard AccessoriesIndexable insert: 2 pcs. (installed)Indexable Insert Set Screw: 2 pcs. (installed)Indexable Insert Set Screw: 2 pcs. (a back up supply)Hex. Key 2 for chamfering adjustment: 1 pc.
T-6F wrench for cutter set screw: 1 pc.
Optional AccessoriesTB09097 Indexable Insert (10 pcs./set)TB09140 Guide Plate 78 AssemblyTB09143 Plate Assembly for straight edge use (requires use of TB09140 Guide Plate 78 Assembly)Comparison between CB-01 and conventional toolsComparison with CB-02・ CB-02: Since the disk sub assembly (round guide plate) is large in size, it often hits a difference inlevel or projection. This restricts and hinders the chamfering work.
CB-01: The guide plate is downsized.

・ CB-02: As the bearing that runs on the side surface of the workpiece is large in size, it cannot go intothe rounded corner of the machined parts.（Acceptable Minimum Radius of rounded corner: 6R）(6mm, 8mm, and 10mm diameter end mills are mostly used in mechanical working.)CB-01: Most popular diameter size of end mill in Japan is 6 mm. Therefore, CB-01 is designed so that itcan chamfer the edge of the rounded corner 3R.
(Acceptable Minimum Radius of rounded corner: 3R)・ CB-02: The bearing that runs on the side surface of the workpiece projects greatly from the bottom of thedisk sub assembly (round guide plate). If the groove or hole depth in the workpiece is shallow, thetip of the cutter spindle reaches the bottom of the hole. This does not allow you to chamfer theedge on the workpiece.
CB-01: The projected length of the end of the indexable insert holder from the round guide plate isfar less than that of CB-02.
Comparison ExampleProjected length from the round guide plate in the case of 1CCB-02:18.0 mmCB-01:5.5 mm2

・ CB-02: It cannot chamfer a thin plate. The thin plate will become caught in the gap between the roundguide plate and the ball bearing. (Minimum plate thickness is 10 mm.)CB-01: It can chamfer a thin plate. (Minimum plate thickness is 1.5 mm.)Comparison with Machining Center (MC)・ MC: Programming for chamfering work is required.
CB-01: Just place CB-01 on the edge to be chamfered. No need for preparation.
・ MC: MC should not be used for light-chamfering work in order to increase the rate of its operation.
CB-01: While waiting for the MC to finish processing work, an operator can finish light-chamfering workwith CB-01.
Comparison with Grinders・ Grinder: Chamfered surface is uneven and looks bad.
CB-01: Chamfered surface is even and smooth, and looks fine.
・ Grinder: Secondary burrs are caused by grinding.
CB-01: No secondary burr is caused by chamfering.
Features・ Employing two indexable inserts results in a significant speedup in chamfering work.
・ Employing long life 3-sided indexable inserts makes it possible to reduce the running cost.
・ Compact and lightweight model enhances operator’s productivity. The downsized guide plate enables anoperator to perform chamfering work in confined areas.
・ A newly developed energy-saving and high efficient motor provides high output power, yet low airconsumption.
・ The long life motor is cost-effective in maintenance.
・ Easy replacement of indexable insert.
・Elongated hole edges and curved edges can be chamfered.

Expected work sites to be used.
・Die and mold manufacturing・Machining・Sheet-metal processingCB-01 will be mainly used in the above-mentioned work sites. This tool can be used wherever burrs arecaused during processing work in the industries ranging from precision machinery industry to heavyindustry. It can be expected that this tool will be much more used in the applications of elongated hole edgesand curved edges rather than straight edges.
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