Disc and Hub Assemblies

Brake Discs

	12.7 mm thick brake discs
	Nominal Diameter	A	B	C	D Min.	Inertia kgm2	Weight kg	Max. Safe Disc Speed
	250	250	128	36	30	0.04	4.0	6500
	300	305	166	41	51	0.09	7.3	6000
	350	356	210	54	76	0.17	10.9	5100
	400	406	260	54	102	0.28	14.1	4400
	460	457	311	54	102	0.48	19.1	3900
	515	514	368	54	102	0.75	22.7	3500
	610	610	464	54	102	1.57	33.0	2900
	710	711	565	54	102	3.20	52.3	2500
	810	813	660	54	102	6.57	85.5	2200
	915	914	762	54	102	10.80	110.9	1900
Twiflex brake discs may be supplied bored and drilled to customer requirements. Non-standard disc sizes, not shown in the tables, can be supplied to order. Brake discs are manufactured from spheroidal graphite iron.	All dimensions in mm
	25.4 mm thick brake discs
	Nominal Diameter	A	B	C	D Min.	Inertia kgm2	Weight kg	Max. Safe Disc Speed
	610	610	343	76	125	2.75	66	2900
	760	762	495	76	125	7.0	104	2300
	915	914	648	76	230	16.0	150	1900
	1065	1067	800	76	230	29.1	220	1600
	1220	1219	914	76	230	49.1	273	1400
	1370	1372	1067	76	*	80.1	346	1200
	1525	1524	1219	76	*	120.5	393	1100
	1830	1829	1524	76	*	243.5	522	1000
	All dimensions in mm *Bores cast and machined to order

Range of Hubs used with Twiflex Brake Discs
Hub Size	A	B*	C	Disc Size	Max. Brake Torque (kNm)	WR2 (kgm2)
112	99	14-42	58	250	1.1	0.00097
168	146	28+65	87	300	3.6	0.0088
240	200	60-95	117	400	9.5	0.044
330	272	75-130	155	400	24.0	.23
370	308	90-150	176	501	30.0	0.35
*Hubs can be supplies with parallel or taper bores, and keywayed to order, at extra cost. Hubs are manufactured from steel 080M40.