TAP PRODUCTION RATES

 

TAP FLUTE GRINDERS

Normac F575, F675
(PIECES / HR)

#10 (3 mm).............................................160
1/4" (6 mm)............................................150
3/8" (10 mm)..........................................120
1/2" (13 mm)..........................................100
5/8" (16 mm)............................................80


Normac FT60, FT66, FT80, FT88
(PIECES / HR)

#6 (3 mm) and smaller................210 to 240
#8 (4 mm)....................................180 to 220
#10 (5 mm)..................................160 to 210
#12 (5.5 mm)...............................140 to 190
1/4" (6 mm).................................100 to 130
5/16" (8 mm)...............................100 to 130
3/8" (9 mm)...................................85 to 100
7/16" (11 mm)...............................70 to 90
1/2" (13 mm).................................60 to 75
9/16" (14 mm)...............................50 to 65
5/8" (16 mm).................................45 to 60
3/4" (19 mm).................................40 to 55
These are estimated production rates for
varying numbers of flutes.

 
Normac FTX2
FLUTE GRIND ONLY
(SIZE PIECES / HR)

               2 FLUTE   3 FLUTE   4 FLUTE

M3..............200.........190
M5..............190.........140...........130
M6..............120.........100.............90
M8..............100..........90..............80
M10..............80..........75.............70
M12..............55..........50.............40
M14............................40.............35
M16............................40.............35
M20.............................................30

SPIRAL POINT ONLY
(SIZE PIECES/HR)

     2 FLUTE   3 FLUTE   4 FLUTE

M3..............200...........200
M4..............200...........190...........180
M5..............190...........190...........180
M6..............180...........150...........140
M8..............150...........130...........120
M10............120...........100............90
M12..............70............70.............70
M14..............................55.............60
M16..............................50.............50
M20...............................................40

NOTE Spiral point only grinding requires accurate
and consistent flute to square orientation.

 

TAP THREAD GRINDER

Normac GT77

NOMINAL TAP SIZE	MULTI-RIB VITRIFIED BOND WHEEL SECS/PC-THREADING CUTS	SINGLE-RIB RESIN BOND WHEEL SECS/PC-THREADING CUTS	PCS/HR	NOMINAL TAP SIZE
M3 X 0,5 #5-40	43-2 43-2	47-2 47-2	84 84	M3 X 0,5 #5-40
M4 X 0,7 #8-32	41-2 38-2	48-2 44-2	88 95	M4 X 0,7 #8-32
M5 X 0,8 #10-24	38-2 36-2	44-2 42-2	95 100	M5 X 0,8 #10-24
M6 X 1,0 1/4-20	36-2 34-2	42-2 40-2	100 106	M6 X 1,0 1/4-20
5/16-18 M8 X 1,25	34-2 35-2	40-2 43-2	106 103	5/16-18 M8 X 1,25
3/8-16 M10 X 1,50	35-2 35-2	43-2 43-2	103 103	3/8-16 M10 X 1,50
M12 X 1,76 1/2-13	36-2 36-2	54-3 54-3	100 100	M12 X 1,76 1/2-13
M14 X 2,00 9/16-12	38-2 38-2	56-3 56-3	95 95	M14 X 2,00 9/16-12
M16 X 2,0 5/8 - 11	42-2 42-2	60-3 60-3	86 86	M16 X 2,0 5/8 - 11
M18 X 2,50 3/4 - 10	46-2 46-2	64-3 64-3	78 78	M18 X 2,50 3/4 - 10

 

 

 

 

 

 

 

 

 

1. Rates are floor to floor for a GT77 with cradle (walking beam) loader, thread grind only.
2. Thread lengths are ISO and ANSI standard short length.
3. Per piece rates for cassette style loader; subtract 3 seconds.
4. Per piece rates for full wheel chamfer (lead) grind; add 7 seconds.
5. Per piece rates for thread by thread chamfer (lead) grind;
(2 - 3 threads) add 27 seconds, (5 - 6 threads) add 37 seconds.
6. Rates are not the best achievable but are published only as a starting point guideline. Actual rates are dependent
upon type of grinding wheel, coolant condition, tap material, and product quality demand.
 

Normac MX16

SIZE                           THD/HR        THD&CHAM/HR

20x2.5...................20..................15
24x3.0...................18..................13
30x3.5...................16..................12
36x4.0...................14..................10
42x4.5...................12...................8
48x5.0...................10...................6

Rates are based on using CNC profile dressing, which adds about
1 minute to the cycle, but is more versatile and better suited to small lot
production (10 to 20 pieces). If a plunge diamond is used, like the ones used on the GT77,
the pieces per hour would be increased about 20%.

 

TAP CHAMFER AND OD GRINDERS

Normac TC75
(PIECES / HR)

#4 to #5 (3 mm - 3.5 mm).........................................................400 - 550
#6 to #10 (3.5 mm - 5 mm).......................................................450 - 600
#12 to 5/16" (5.5 mm - 8 mm)..................................................400 - 600
3/8" (9.5 mm)............................................................................360 - 520
7/16" to 1/2" (11 mm - 13 mm)................................................320 - 450
9/16" to 5/8" (14 mm - 16 mm)................................................200 - 320
11/16" to 3/4" (17.5 mm - 19 mm)...........................................150 - 240
These are estimated production rates for varying numbers of flutes.
 

Normac OD40
(PIECES / HR)

1/4" to 1/2" (6 mm - 13 mm)..................180
9/16" to 3/4" (14 mm - 19 mm)...............120

 

Hertlein SF-300
(PIECES / HR)

#6 (3 mm) and smaller......................................................210 to 240 pcs/hr
#8 (4 mm)........................................................................180 to 220 pcs/hr
#10 (5 mm)......................................................................160 to 210 pcs/hr
#12 (5.5 mm)...................................................................140 to 190 pcs/hr
1/4" (6 mm)......................................................................100 to 130 pcs/hr
5/16" (8 mm)....................................................................100 to 130 pcs/hr
3/8" (9 mm)........................................................................85 to 100 pcs/hr
7/16" (11 mm)....................................................................70 to 90 pcs/hr
1/2" (13 mm)......................................................................60 to 75 pcs/hr
9/16" (14 mm)....................................................................50 to 65 pcs/hr
5/8" (16 mm)......................................................................45 to 60 pcs/hr
3/4" (19 mm)......................................................................40 to 55 pcs/hr

 

Hertlein FG-D500-
(PIECES / HR)

#10 (3 mm).............................................................160
1/4" (6 mm).............................................................150
3/8" (10 mm)...........................................................120
1/2" (13 mm)...........................................................100
5/8" (16 mm).............................................................80

Rates shown are averages based on actual operation, and are for varying numbers of
flutes. Actual rates may vary depending upon grinding wheel, coolant oil, type of
steel, etc.

 

Hertlein GP-125
(PIECES / HR)

SIZE                                         PIECES / HR        
                           2 FLUTE         3 FLUTE           4 FLUTE
M3                 200             200               ---
M4                 200             190              180
M5                 190             190              180
M6                 180             150              140
M8                 150             130              120
M10               120             100               90
M12                70               70                70
M14                ---              55                60
M16                ---              50                50
M20                ---              ---                40
 

Hertlein TC-110
(PIECES / HR)

#4 to #5 (3 mm - 3.5 mm)...............400 - 550
#6 to #10 (3.5 mm - 5 mm).............450 - 600
#12 to 5/16" (5.5 mm - 8 mm).........400 - 600
3/8" (9.5 mm)..................................360 - 520
7/16" to 1/2" (11 mm - 13 mm)........320 - 450
9/16" to 5/8" (14 mm - 16 mm)........200 - 320
11/16" to 3/4" (17.5 mm - 19 mm)...150 - 240


 

Normac SQ75
(PIECES / HR)

Projected cycle time 12 to 17 Seconds

 

Hertlein SQ-100
(PIECES / HR)

#6......................................650
#8........ .............................690
#10....................................650
1/4”....................................400
5/16”.................................600
3/8"....................................480
7/16”.................................460
1/2”....................................450
5/8”....................................300
3/4”....................................300
1”......................................120
1-1/2”.................................70
2”.......................................30

 

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