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Blade Guides

Recommended Peripheral Cutting Speeds

Wet Cutting Masonry Bench Saw Blades
blade ∅ (mm)	average (rpm)	optimum cutting speed m/second
100	9072	48
105	8891	48
115	8063	48
125	7257	48
150	48
180	5184	48
200	4536	48
230	4032	48
250	3629	48
300	3024	48
350	2592	48
400	2268	48
450	2016	48
500	1814	48
600	1512	48

Dry Cutting Masonry Bench Saw Blades
blade ∅ (mm)	average (rpm)	optimum cutting speed m/second
100	15300	80
105	15300	80
115	13300	80
125	12300	80
150	10185	80
180	8730	80
200	7600	80
230	6650	80
250	6415	80
300	6360	80
350	5450	80
5450	80
400	3820	80
450	3395	80
500	3055	80
600	2520	80

Speeds for Rotational Core Bits				Machine Power for Core Bits
core bit ∅ (mm)	concrete soft aggregates	concrete medium aggregates	concrete hard aggregates	tool outside ∅ (mm)	machine power kw/hp
20	3,900	2,900	1,900	5-10	0.35/0.5
30	2,700	2,000	1,300	10-50	1.0/1.4
40	1,800	1,400	1,000	50-60	1.2/1.4
50	1,500	1,150	800	60-70	1.2/1.7
60	1,250	950	650	70-80	1.5/2.0
70	1,050	800	550	80-90	2.0/1.7
80	950	700	450	90-100	2.0/1.7
100	760	570	380	100-110	2.0/1.7
120	640	480	320	110-120	2.0/1.7
140	540	410	280	190-230	2.5/3.4
160	480	360	240	230-260	2.5/3.4
180	440	330	220	260-280	2.8/3.8
200	360	270	180	280-300	3.1/4.2
250	300	225	150	300
300	250	180	125
350	220	160	110
400	180	135	90
450	160	120	80
500	150	110

Wet Cutting Floorsaw Blades			Note:
blade ∅ (mm)	average (rpm)	optimum cutting speed m/second	The across are the average recommended cutting speeds, to obtain maximum performance the specific speeds for each application should be adhered to. Wet cutting concrete 35-45m/sec Dry cutting concrete 60-100m/sec Wet cutting asphalt 50-65m/sec Dry cutting asphalt 60-100m/sec Wet cutting green concrete 50-60m/sec
350	2592	48
400	2268	48
450	2016	48
500	1814	48
600	1512	48
700	1296	48
750	1210	48
800	1134	48
900	1008	48
1000	864	48	Recommended water flow rate for wet cutting
1100	810	48	blade ∅ (mm)	flow rate 1/min
1200	756	48	0-250	6
1300	698	48	300-600	15
1450	648	48	600-1000	30
1500	605	48	1000-1200	50
1600	567	48	1200-1500	65
1800	504	48	1500-1800	75

Recommended Coolant Flow for Wet Core Bits
∅ (mm)	flow L/M
20-52	3
65-78	4
82-102	5
107-127	6
152-187	8
200-212	9
225-250	10
300-350	12
350-400	18
500-600	24
600+	30

Recommended Cutting Depths & Speeds

Recommended Cutting Depths & Speeds
blade ∅		cutting depth		general operating speed (rpm)	Recommended operation speed (rpm)
inch	mm	inch	mm
Concrete Saw Blades
12	300	3 5/8	92	3024	5094
14	350	4 5/8	117	2592	4365
16	400	5 5/8	143	2268	3820
18	450	6 5/8	168	2016	3395
20	500	7 5/8	194	1814	3055
24	600	9 5/8	244	1512	2550
26	660	10 5/8	270	1396	2350
30	760	11 3/4	300	1120	2040
36	910	14 3/4	375	1008	1700
High Speed Saw Blades
12	300	4	100	4300	6300
14	350	5	125	4300	5400
Wall Saw Blades
18	450	6 1/2	165	1500	3000
24	600	9 1/2	240	1450	2250
30	760	12 1/2	317	1400	1800
36	910	15 1/2	394	1300	1500
Masonry Saw Blades
14	350	5	125	2550	3900
18	450	7	178	2300	3000
20	500	8	200	2300	2900
Tile Saw Blades
6	150	1 3/4	45	6050	10175
7	178	2 1/4	57	5175	8725
8	200	2 3/4	70	4500	7650
9	230	3 1/4	83	4025	6800
10	250	3 3/4	95	3625	6125
Power Hand Blades
4	100	1	25	9075	15000
4 1/2	115	1 1/4	30	8065	13300
5	125	1 1/2	40	7250	12000
7	178	2 1/2	65	5175	8725
8	200	3	75	5180	8730
9	230	3 1/4	83	4540	7640

Diamond blade cutting depths listed above are approximate. Actual cutting depth will vary with the exact blade diameter or saw type (or brand), or the exact diameter of the blade collars (flanges). Cutting depth will also be reduced if saw components (motor housing, blade guard) extend below the blade collars (flanges).

Variables which affect Performance
variables	condition	cutting speed	blade life
Bond hardness	harder softer	slower faster	longer shorter
Diamond quality	lower higher	slower faster	shorter longer
Diamond concentration	lower higher	faster slower	shorter longer
Segment height	thinner thicker	faster slower	shorter longer
Horsepower	lower higher	slower faster	longer shorter
Blade rpm	lower higher	faster slower	shorter longer
Water flow	lower higher	faster slower	shorter longer
Cutting depth	shallow deep	faster slower	longer shorter
Material hardness	harder softer	slower faster	longer shorter
Abrasiveness	more less	faster slower	shorter longer
Aggregate size	larger smaller	slower faster	shorter longer
Steel reinforcement	less more	faster slower	longer shorter

* Based on 9,500 SFPM (Surface Feet Per Minute) the general optimum performance range for cutting concrete and masonry products is = 10%.
For hard, dense materials such as stone and tile, the optimum performance speed is 10-25% less than the speeds shown on ‘Maximum blade cutting depths and operating speeds’ table. Blade shaft speeds (RPMs at no load) for most tools will be higher than recommended operating speeds shown on ‘Maximum blade cutting depths and operating speeds’ table. Under normal sawing conditions, the actual blade shaft speed or the tool will slow down under load, and should fall within the optimum speed range.
** This speed RPM represents the recommended operating speed in revolutions per minute at which each blade can be used. Before using any blade, make sure the blade shaft speed of the tool is within the “maximum safe” limit of that blade. All JCB Diamond products are tested to EN13236 specification and guidelines. The maximum recommended cutting speed of all blades must not exceed 100m/sec.