RTM 270/B - Berco S.p.A

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Technical dataWorking ca p a c i t yMax. diameter ground with full-size wheel m m 150 5 29 /32”Max. swing over table m m 540 21 1 /4”Min. diameter admitted in steady re s t s m m 30 1 11 /64”Max. diametera dmitted in steady re s t s m m 140 5 33 /64”Max. eccentricity of workheads (throw) m m 120 4 23 /32”Max. mass admitted between ce n t e rs kg 300 661 lbGeometric fe a t u re sHeight of center over table mm 270 10 5 /8”Max. distance between ce n t e rs (2 exe c u t i o n s ) m m 1300 - 1600 - 1950 51” - 63” - 76 25 /32”Max. distance between chucks (2 exe c u t i o n s ) m m 1270 - 1569 - 1919 50” - 61 25 /3 2” - 75 9 /16”S e l f - centering chuck diameter m m 180 7 3 /32”Max. grinding wheel diameter m m 710 28 ”Min. grinding wheel thickness m m 202 5/32”S t a n d a rd grinding wheel thickness m m 25 1 ”Max. grinding wheel thickness m m 63 2 31 /64”W h e e l h e a dTravel, fa s t m m 180 7 5 /64”Travel, fine m m 165 6 31 /64”Max. travel for plunge grinding m m 1 , 5 . 060 ”Feed per turn of the handwheel m m 1 . 040 ”H e a d s t o c kWo r k p i e ce rotation speed (6) r. p . m . 16 - 22 - 30 - 40 - 52 - 70* Wo r k p i e ce rotation speed (stepless va r i a b l e ) r. p . m . 12 ÷ 60Ta b l eM i c rometer feed per turn of the handwheel m m 5 , 84 . 23 ”Fast trave rse speed, per minute m / m i n 6 236” in/minS l ow trave rse speed, steplessly adjustable (only for D execution), per minute m / m i n 0,05 - 0,35 2 - 13 9 /1 6” in/minMotor ra t i n gW h e e l h e a d k W 4 (5,50 CV)H e a d s t o c k k W 0,45 ÷ 0,24 (0,6 ÷ 0,32 CV)* Headstock k W 0,24 ÷ 1,45 (0,32 ÷ 2 CV)Fast table trave rs e k W 0,55 (0,75 CV)S l ow table trave rse (only for D exe c u t i o n ) k W 0,62 (0,84 CV)H yd raulic sys t e m k W 0,55 (0,75 CV)Cooling sys t e m k W 0,15 (0,20 CV)Dimensions and massesLenght A (see fig. 32) m m 4500 - 5500 - 6219 177” - 216 17 /3 2” - 244 27 /32”Width B (see fig. 32) m m 1760 69 1 /8”Height C (see fig. 32) m m 1837 72 21 /64”A p p rox. mass, unpacked (exec. 1300) k g 3250 7150 l bA p p rox. mass, ocean packed (exec. 1300) k g 3820 8404 l bA p p rox. mass, unpacked (exec. 1600) k g 3400 7496 l bA p p rox. mass, ocean packed (exec. 1600) k g 4100 9039 l bA p p rox. mass, unpacked (exec. 1950) k g 3450 7606 l bA p p rox. mass, oce a n p a c ked (exec. 1950) k g 4150 9140 l bM e a s u rements, masses and executions can be changed without previous notice. Motor rating is re ffe red to 50 Hz fre q u e n c y.*Data valid for machines with stepless variable speed workhead motor.Fig. 32
Others crankshaft grinders of the RTM seriesBesides the RTM 270 Berco ismanufacturing other crankshaftgrinder models; their mainspecifications are set forthhereunder:RTM 351Center height over table350 mm (13 3 /4” ) .Max. swing over table 700 mm( 2 7 9 /1 6” ) .Max. distance between ce n t e rs2400-3000 mm( 9 4 3 1 /6 4” - 118 7 /6 4” ) .Max. mass admitted betwe e nce n t e rs 800 kg (1760 lb).RTM 425ACenter height over table425 mm (16 3 /4” ) .Max. swing over table 850 mm( 3 3 1 /2” ) .Max. distance between ce n t e rs4020 mm (158 1 /6 4” ) .Max. mass admitted betwe e nce n t e rs 1200 kg (2645 lb).RTM 575Center height over table575 mm (22 5 /8” ) .Max. swing over table1150 mm (45 9 /3 2” ) .Max. distance between ce n t e rs4020 mm (158 1 /6 4” ) .Max. mass admitted betwe e nce n t e rs 1200 kg (2645 lb).RTM 700Center height over table700 mm (27 9 /1 6” ) .Max. swing over tablea1400 mm (55 1 /8” ) .Max. distance between ce n t e rs5700-6900 and 8000 mm( 2 2 4 1 3 /3 2” - 271 2 1 /3 2” e 315”).Max. mass admitted betwe e nce n t e rs 6000 kg (13200 lb).R T M 3 5 1R T M 5 7 5
Page 1 and 2: RTM 270Crankshaft grinderA Companyo
Page 3 and 4: Fig. 4Workhead where the fo u rm ov
Page 5 and 6: RTM 270/D - 1300 - 1600 - 2000Simil
Page 7 and 8: Fig. 9 Fig. 10Fig. 9Rear view of ta
Page 9 and 10: Fig. 15 Fig. 16Plunge feed device f
Page 11 and 12: Fig. 20 Fig. 21Fig. 22Fig. 23Fig. 1
Page 13: Fig. 28Fig. 24Grinding a center wit

RTM 270/B - Berco S.p.A

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