Sakai LCD-B Series Precision Spring Coupling

Manufacturer: Sakai Manufacturing Co., Ltd.
Model: LCD-B Series

Features

Streamlined body results in low inertia specifications.
Unique laminated leaf spring with excellent precision and rigidity used as flexure material. Bolting two sets of laminated leaf springs to the hub creates a non-backlash structure and high flexibility, achieving high precision and high torque rotation transmission.
Two sets of laminated leaf springs sandwiched between spacers absorb eccentricity, angular misalignment, and axial displacement. A precision shaft coupling combines high versatility, high flexibility, easy centering, and high precision rotation transmission.

(Dimensions: mm)

Model number	d	A	E	P	L	S	T	J	G	M
LCD-45B	8~16	45	31	18	52	26	28	17	18	M4
LCD-55B	10~19	55	38	21	60	30	32	20	20	M5
LCD-65B	12~ 25	65	44	26	73	36.5	38	24.5	24	M6/M5
LCD-80B	12~35	80	57	36	83	41.5	39	29	25	M8/M6
LCD-90B	17~35	90	63	37	96	48	54	31	34	M8
LCD-100B	20~40	100	70	41	109	54.5	57	36	37	M10/M8
LCD-125B	32~42	125	88	51	130	65	71	42.5	45	M12
LCD-155B	45~60	155	112	61	154	77	84	50	54	M14

Model number	Allowable torque N・m	Allowable eccentricity mm	Allowable deviation angle °	Allowable axial displacement mm	Maximum rotation speed min^-1	Torsional stiffness		Axial spring constant N/mm	Moment of inertia kg・m2	Mass kg
Model number	Allowable torque N・m	Allowable eccentricity mm	Allowable deviation angle °	Allowable axial displacement mm	Maximum rotation speed min^-1	Overall N・m/rad	Leaf spring only N・m/rad	Axial spring constant N/mm	Moment of inertia kg・m2	Mass kg
LCD-45B	12	0.23	1	±0.65	10,000	0.74×10⁴	1.25×10⁴	29	0.51×10^-4	0.24
LCD-55B	25	0.27	1	±0.79	10,000	1.47×10⁴	2.50×10⁴	29	1.36×10^-4	0.43
LCD-65B	40	0.32	1	±0.93	10,000	2.94×10⁴	1.30×10⁵	62	3.20×10^-4	0.7
LCD-80B	80	0.33	1	±1.15	10,000	5.88×10⁴	1.02×10⁵	37	7.79×10^-4	1.11
LCD-90B	180	0.45	1	±1.27	10,000	8.82×10⁴	1.95×10⁵	45	1.56×10^-3	1.76
LCD-100B	250	0.47	1	±1.43	10,000	1.18×10⁵	3.30×10⁵	53	2.65×10^-3	2.46
LCD-125B	400	0.58	1	±1.79	10,000	2.06×10⁵	6.50×10⁵	42	8.28×10^-3	5.12
LCD-155B	800	0.7	1	±2.25	10,000	3.23×10⁵	1.15×10⁵	29	2.39×10^-2	9.28

(Unit: mm)

Model number	d
Model number	35	38	40	42	45	48	50	55	60
LCD-155B	🟤	🟤	🟤	🟤	●	●	●	●	●

The moment of inertia and mass are calculated, the shaft hole diameter is at its maximum.
Be sure to insert the mounting shaft up to the J dimension.
The recommended shaft tolerance is h6. (Shaft diameter 35mm, tolerances of 0 to +0.010 are supported.)
The allowable axial displacement represents the case the deviation angle is zero.
The maximum rotation speed does not take dynamic balance into consideration.
The 🟤 mark indicates a non-standard hole diameter (delivery confirmation hole diameter).