Brackley Engineering Services Ltd - Rotating Tools

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Rotating tool - Type MRA

Rotating Tools - Type MRA/MRR
The rotating toolholders of MRA and MRR type, with shank as per DIN 69880/1 standard, are components applicable on toolholder discs of turrets for CNC lathe machines utilizable for drilling, milling and tapping operations.

Main characteristics
• Compact overall dimensions
• Coupling of the rotating tool is made via preloaded, multi-teeth
Hirth clutch (without backlash) which assures the possibility of
difficult milling operations
• The most important pieces are hardened and ground
• Different ratios are available
• Different clutch-types are available
• Different tool fittings are possible

<< TECHNICAL DRAWING >>
MRR 20/50
MRA 60
MRA 60
MRA 60
MRR 60
MRR 60
MRA 80
MRA 80
MRR 80
MRR 80
<< TECHNICAL DATA >>

Type - Main Dimension	-	-	-	MRA	-	-	-
Y (mm)	20	25	30	40	50	60	80
Max Power (KW)	4	5	5	9	12	15	18,5
Ratio	1	1	1	1.00/ 2.87	1.00/ 2.87	1.00/ 2.44	1.00/ 2.56
Max torque at tool (Nm)	15	20	20	60/135	80/180	145	240
Max speed at tool (RPM)	6000	6000	6000	5000/ 1500	4000/ 1500	2000	1700
Weight (Kg)	1	1.2	2	2.9	3.9	-	-
A	44	52	59	68	84	-	-
B	19	24	24	32	32	-	-
C	17.7	21.7	29.7	29.7	35.7	-	-
D (mm)	64	68	68	83	95	-	-
E	44	49	55	74	83	-	-
F	-	-	87	110	125	-	-
G	43	45	55	65	72	-	-
H	-	-	-	-	-	-	-

Type - Main Dimension	-	-	-	MRR	-	-	-
Y (mm)	20	25	30	40	50	60	80
Max Power (KW)	4	5	5	9	12	15	18,5
Ratio	1.00/ 1.20	1.00/ 1.20	1.00/ 1.20	1.50/ 2.46	1.50/ 2.46	1.00/ 2.44	1.00/ 2.56
Max torque at tool (Nm)	15/18	20/24	20/24	60/105	80/130	145	240
Max speed at tool (RPM)	5000/ 4000	5000/ 4000	5000/ 4000	3500/ 1200	3000/ 1200	2000	1700
Weight (Kg)	2.5	2.8	4	5	6	-	-
A	44	52	59	68	84	-	-
B	19	24	24	32	40	-	-
C	17.7	21.7	29.7	29.7	35.7	-	-
D (mm)	58	58	64	83	96	-	-
E	55	55	60	70	85	-	-
F	28	28	27	35	45	-	-
G	30	30	38	40	41	-	-
H	61	61	80	105	115	-	-

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