Sakai UCR Series Precision Compensation Coupling

Manufacturer: Sakai Manufacturing Co., Ltd.
Model: UCR Series

Feature

Adapt the unmachined shaft hole to various mounting specifications. It supports a maximum outer diameter of 200 mm.

(Dimensions: mm)

Model	Allowable Torque (N·m)	Maximum Torque (N·m)	Allowable Thrust Load (N)	Allowable Eccentricity (mm)	Allowable Angular Misalignment (°)	Max Rotational Speed (min⁻¹)	Torsional Stiffness (N·m/rad)	Moment of Inertia (kg·m²)	Mass (kg)
UCR-34	2.5	5	170	0.2	1	6000	0.59×10⁴	0.15×10⁻⁴	0.14
UCR-38	5	10	300	0.2	1	6000	0.95×10⁴	0.26×10⁻⁴	0.2
UCR-45	10	20	500	0.2	1	6000	1.91×10⁴	0.69×10⁻⁴	0.39
UCR-55	20	40	850	0.2	1	6000	5.01×10⁴	1.95×10⁻³	0.73
UCR-65	40	80	1450	0.2	1	6000	1.08×10⁵	4.19×10⁻³	1.12
UCR-80	80	160	2350	0.2	1	6000	2.37×10⁵	1.21×10⁻³	2.16
UCR-100	160	320	3750	0.2	1	6000	4.66×10⁵	3.67× 10⁻³	4.22
UCR-125	320	640	6000	0.2	1	6000	8.80×10⁵	1.17×10⁻²	8.29
UCR-155	640	1280	9750	0.2	1	6000	1.66×10⁶	3.36×10⁻²	15.46
UCR-200	1600	3200	19300	0.2	1	6000	4.90×10⁶	1.16×10⁻¹	31.49

Model	Maximum Shaft Diameter	A	E	P	L	S	T	J	G
UCR-34	11	34	22	12	40	20	18	14	12
UCR-38	14	38	25	15	50	25	20	17.5	15
UCR-45	19	45	31	20	64	32	24	23.5	17
UCR-55	24	55	38	25	80	40	28	30	20
UCR-65	28	65	44	30	90	45	33	33	24
UCR-80	38	80	57	39	110	55	36	41	28
UCR-100	42	100	68	45	140	70	48	53	34
UCR-125	60	125	88	61	170	85	61	63	44
UCR-155	75	155	112	76	200	100	71	74.5	51
UCR-200	90	200	138	92	250	125	108	91	58

UCR-125, UCR-155, and UCR-200 are standard products.
Permissible torque indicates the value at a rotational speed of 1500 min⁻¹.
Maximum torque is the torque momentarily transmitted startup and braking.
Permissible thrust load represents the static permissible load with zero load torque.
The torsional rigidity value is for the metal part only.
It may be possible to use it at an offset or angle greater than the permissible value. Please contact us for more information.
The permissible torque and maximum torque do not take into account the strength of the drive shaft and key.
Adapt the UCR-200 to a hub bolt clamping specification as a special specification.

※ The metal of UCR-125, UCR-155, and UCR-200 is ordinary cold-rolled steel (SPCE).

Shaft Installation (In the case of keyway tightening)

Insert the two hubs onto the respective shafts.
Fix the two cross pins to the hubs using the arm clamping bolts, securing two bolts to each hub. Use a torque wrench to tighten the bolts according to the tightening torque listed in the table (page 16). Also, apply an anti-seize compound to the bolts.
For the shaft and keyway tightening, set screws should be installed in the fixed keyway or at two points that are 90° apart from the key’s top, securing with two screws.