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Catalogue Caged Ball LM Guide Actuator Model SKR

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O Accuracy Criteria

The tables below show the accuracy criteria of the SKR-type.

Table 9 Accuracy Criteria

Table 9-1 Standard Quality (No Symbol Assigned) Unit


Model	Rail Length	Repetitive Positioning Accuracy	Positioning Accuracy	Traveling Parallelism	Backlash	Starting Torque (N-cm)
	150
	200
	300
SKR33	400	± 0.010	Not specified	Not specified	0.020	7
	500
	600
	700
	340
	440
SKR46	540	± 0.010	Not specified	Not specified	0.020	10
SKR46	640	± 0.010	Not specified	Not specified	0.020	10
	740
	940
Table 9-2 High Quality (H)						Unit: mm
Model	Rail Length	Repetitive Positioning Accuracy	Positioning Accuracy	Traveling Parallelism	Backlash	Starting Torque (N-cm)
	150
	200		0.060	0.025
	300		0.060	0.025
SKR33	400	± 0.005			0.020	7
	500		0.100	0.035
	600		0.100	0.035
	700		0.120	0.040
	340
	440		0.100	0.035
SKR46	540	± 0.005	0.100	0.035	0.020	10
SKR46	640	± 0.005			0.020	10
	740		0.120	0.040
	940		0.150	0.050
Table 9-3 Precision Quality (P)						Unit: mm
Model	Rail Length	Repetitive Positioning Accuracy	Positioning Accuracy	Traveling Parallelism	Backlash	Starting Torque (N-cm)
	150
	200
	300		0.020	0.010
SKR33	400	± 0.003			0.003	15
	500		0.025	0.015
	600		0.025	0.015
	700		0.030	0.020
	340
	440		0.025	0.015		15
SKR46	540	± 0.003	0.025	0.015	0.003
	640					17
	740		0.030	0.020		17

The evaluation method of the accuracy criteria complies with the THK standards.

The starting torque shows a value achieved when THK AFB-LF grease is used with the product.

If high-viscosity grease, such as vacuum grease or clean room grease, is used, there are cases where the criteria value is exceeded. In such a case, exercise care when selecting the motor.

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