Nitto Kohki Annular Cutters

Product Made in Japan
Manufacturer: Nitto Kohki
Model: Jetbroach & Hi-broach

 Cutters

Tungsten Carbide Tipped Annular Cutters
For simplicity, one-touch cutter replacement needs no tools

Rationalized Hole-cutting

Genuine one-touch cutters

Nitto Kohki has developed the one-touch replacement system for Jetbroach carbide-tipped annular hole cutters. They are designed to be mounted and removed without the use of a tool. This reduces the time needed to replace cutters.
Jetbroach Cutters are far better than twist drills:
  • No dead point
  • Peripheral cutting
  • Dramatically reduce cutting resistance
  • Available size: 9/16” – 4” diameter

Features

  • Carbide tips for faster cutting
  • Single pass cutting, no pilot hole required
  • Annular part does all the work so small cutting resistance reduces drilling time
  • Cutting of slanted, elongated and edge holes is now possible
  • Fractional and metric cutter sizes to suit wide range of applications
  • Produces little slag and few chips for easy disposal
  • Can also be fitted to and used with previous Atra Ace models using a hexagon socket set-screw
  • Improved concentricity extends cutter life! One-touch system consisting of three balls inside the arbor body produces a self-centering effect during cutting to improve cutter performance and life

   

Feed & Speeds For Annular Cutters

A guide to the selection of circumferential cutting speeds:

feet/minm/min
Stainless Steel65 – 13120-40
Mild Steel98 – 16430-50
Cast Iron98 – 16430-50
Brass164 – 22950-70
Aluminum229 – 29570-90

Test Drilling is very often the only way to determine the machinability of difficult materials. Use a small size cutter wherever possible in order to minimize trial costs.

Cutter DiameterDecimal Equivalent1-3/8″ Depth of Cut Part #2″ Depth of Cut Part #3″ Depth of Cut Part #4″ Depth of Cut Part #
9/16″.563TK01160*TK01162**––
5/8″.625TK01161*TK01163**––
*Exception of TK01160 and TK01161 are 1” DOC uses UEA0625 Pilot Pin
**Exception of TK01162 and TK01163 uses UEA0650 Pilot Pin
11/16″.688TK00517TK00559TK01037–
17.5mm.689TK01249TK01282TK01350
18mm.709TK01250TK01283TK01351
18.5mm.728TK01251–
19mm.748TK01252TK01284TK01352
3/4″.750TK00518TK00560TK00981–
19.5mm.768TK01253TK01285
20mm.787TK01254TK01286TK01353
20.5mm.807TK01255TK01287
13/16″.813TK00519TK00561TK00982TK01054
21mm.827TK01256TK01288TK01354
21.5mm.846TK01257TK01289
22mm.866TK01258TK01290TK01355
7/8″.875TK00520TK00562TK00983TK01055
22.5mm.886TK01259TK01291
23mm.906TK01260TK01292TK01356
23.5mm.925TK01261TK01293
15/16″.938TK00521TK00563TK00984TK01056
24mm.945TK01262TK01294TK01357
24.5mm.965TK01263TK01295TK01358
25mm.984TK01264TK01296TK01359
1″1.000TK00522TK00564TK00985TK00958
26mm1.024TK01266TK01298TK01360
26.5mm1.043TK01267TK01299TK01361
1-1/16″1.063TK00523TK00567TK00986TK01058
27mm1.063TK01268TK01300TK01362
28mm1.102TK01269TK01301TK01363
1-1/8″1.125TK00554TK00568TK00987TK01059
29mm1.142TK01270TK01302TK01364
30mm1.181TK01271TK01303TK01365
1-3/16″1.188TK00555TK00565TK00988TK01060
31mm1.220TK01272TK01304TK01366
1-1/4″1.250TK00524TK00569TK00989TK01773
32mm1.260TK01273TK01305TK01367
33mm1.299TK01274TK01306TK01368
1-5/16″1.313TK00525TK00570TK00990–
34mm1.339TK01275TK01307TK01369
1-3/8′1.375TK00526TK00571TK00991–
35mm1.378TK01276TK01308TK01370
36mm1.417TK01277TK01309TK01371
1-7/16″1.438TK00641TK00572TK00992–
37mm1.457TK01278TK01310TK01372
38mm1.496TK01279TK01311TK01373
1-1/2′1.500TK00642TK00573TK00993–
39mm1.535TK01280TK01312TK01374
1-9/16″1.563TK00643TK00574TK00994–
40mm1.575TK01281TK01313TK01375
41mm1.614–TK01314TK01376
1-5/8″1.625–TK00575TK00995–
42mm1.654–TK01315TK01377
1-11/16″1.688–TK00576TK00996–
43mm1.693–TK01316TK01378
44mm1.732–TK01317TK01379
1-3/4″1.750–TK00577TK00997–
45mm1.772–TK01318TK01380
46mm1.811–TK01319TK01381
1-13/16″1.813–TK00578TK00998–
47mm1.850–TK01320TK01382
1-7/8″1.875–TK00579TK00999–
48mm1.890–TK01321TK01383
49mm1.929–TK01322TK01384
1-15/16″1.938–TK00580TK01000–
50mm1.969–TK01323TK01385
2″2.000–TK00581TK01001–
51mm2.008–TK01324TK01386
52mm2.047–TK01325TK01387
2-1/16″2.063–TK00644TK01002–
53mm2.087–TK01326TK01388
2-1/8″2.125–TK00645TK01094–
54mm2.126–TK01327TK01389
55mm2.165–TK01328TK01390
2-3/16″2.188–TK00646TK01095–
56mm2.205–TK01329
57mm2.244–TK01330
2-1/4″2.250–TK00647––
58mm2.283–TK01331
2-5/16″2.313–TK00648––
59mm2.323–TK01332
60mm2.362–TK01333
2-3/8″2.375–TK00649––
61mm2.402TK01334
2-7/16″2.438–TK00650––
62mm2.441TK01335
63mm2.480TK01336
2-1/2″2.500–TK00651––
64mm2.520TK01337
65mm2.559TK01338
2-9/16″2.563–TK00652––

Jetbroach cutters with “One-Touch” shanks can be used in drilling machines with 3/4″ side-lock arbors.

Jetbroach Pilot Pins
1-3/8″ Depth of Cut Part #2″ Depth of Cut Part #3″ Depth of Cut Part #4″ Depth of Cut Part #
UEA0835UEA0850UEA0875UEA0800

Industrial Cutters with 1-1/4″ Weldon Shanks*

*Industrial cutters with 1-1/4″ weldon shanks use the special pilot pin #TA9A207-0

Cutter DiameterDecimal Equivalent3″ D.O.C. Part #
50mm1.969TK01433
51mm2.008TK01434
52mm2.047TK01435
53mm2.087TK01436
54mm2.126TK01437
55mm2.165TK01438
56mm2.205TK01439
57mm2.244TK01440
58mm2.283TK01441
59mm2.323TK01442
60mm2.362TK01443
61mm2.402TK01444
62mm2.441TK01445
63mm2.480TK01446
64mm2.520TK01447
65mm2.559TK01448
66mm2.598TK01449
67mm2.638TK01450
68mm2.677TK01451
69mm2.717TK01452
70mm2.756TK01453
71mm2.795TK01454
72mm2.835TK01455
73mm2.874TK01456
74mm2.913TK01457
75mm2.953TK01458
Cutter DiameterDecimal Equivalent3″ D.O.C. Part #
76mm2.992TK01459
77mm3.031TK01460
78mm3.071TK01461
79mm3.110TK01462
80mm3.150TK01463
81mm3.189TK01464
82mm3.228TK01465
83mm3.268TK01466
84mm3.307TK01467
85mm3.346TK01468
86mm3.386TK01469
87mm3.425TK01470
88mm3.465TK01471
89mm3.504TK01472
90mm3.543TK01473
91mm3.583TK01474
92mm3.622TK01475
93mm3.661TK01476
94mm3.701TK01477
95mm3.740TK01478
96mm3.780TK01479
97mm3.819TK01480
98mm3.858TK01481
99mm3.898TK01482
100mm3.937TK01483

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