[THK] — KR33 LM Guide Actuator, Motor In-line (Series), Short Block C/D
LM Guide Actuators THK

[THK] — KR33 LM Guide Actuator, Motor In-line (Series), Short Block C/D

Family ID: THK-KR33-SERIAL-CD

THK KR33 LM Guide Actuator, motor in-line (series) configuration. Available with or without cover. Short block ×1 (C-type) or ×2 (D-type). Integrated LM block and ball screw nut for compact design. Equal load capacity in 4 directions. Stroke range: 75–625 mm (C-type), 25–575 mm (D-type). See model number configuration guide A2-136.

28 product codes available in this family

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Product Codes & Specifications

Product Code Description Brand Spec
KR3320C-0075 KR33 No Cover In-line, Short Block×1, Stroke 75mm THK Model: KR33, Short Block ×1 (C-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 75 mm | Outer Rail Length: 150 mm | Overall Length L1: 220 mm | C: 100 mm | G: 25 mm | Mass: 1.7 kg
KR3320C-0125 KR33 No Cover In-line, Short Block×1, Stroke 125mm THK Model: KR33, Short Block ×1 (C-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 125 mm | Outer Rail Length: 200 mm | Overall Length L1: 270 mm | C: 100 mm | G: 50 mm | Mass: 2.0 kg
KR3320C-0225 KR33 No Cover In-line, Short Block×1, Stroke 225mm THK Model: KR33, Short Block ×1 (C-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 225 mm | Outer Rail Length: 300 mm | Overall Length L1: 370 mm | C: 200 mm | G: 50 mm | Mass: 2.8 kg
KR3320C-0325 KR33 No Cover In-line, Short Block×1, Stroke 325mm THK Model: KR33, Short Block ×1 (C-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 325 mm | Outer Rail Length: 400 mm | Overall Length L1: 470 mm | C: 300 mm | G: 50 mm | Mass: 3.5 kg
KR3320C-0425 KR33 No Cover In-line, Short Block×1, Stroke 425mm THK Model: KR33, Short Block ×1 (C-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 425 mm | Outer Rail Length: 500 mm | Overall Length L1: 570 mm | C: 400 mm | G: 50 mm | Mass: 4.2 kg
KR3320C-0525 KR33 No Cover In-line, Short Block×1, Stroke 525mm THK Model: KR33, Short Block ×1 (C-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 525 mm | Outer Rail Length: 600 mm | Overall Length L1: 670 mm | C: 500 mm | G: 50 mm | Mass: 5.0 kg
KR3320C-0625 KR33 No Cover In-line, Short Block×1, Stroke 625mm THK Model: KR33, Short Block ×1 (C-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 625 mm | Outer Rail Length: 700 mm | Overall Length L1: 770 mm | C: 600 mm | G: 50 mm | Mass: 5.7 kg
KR3320D-0025 KR33 No Cover In-line, Short Block×2, Stroke 25mm THK Model: KR33, Short Block ×2 (D-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 25 mm | Outer Rail Length: 150 mm | Overall Length L1: 220 mm | C: 100 mm | G: 25 mm | Mass: 1.9 kg
KR3320D-0075 KR33 No Cover In-line, Short Block×2, Stroke 75mm THK Model: KR33, Short Block ×2 (D-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 75 mm | Outer Rail Length: 150 mm | Overall Length L1: 220 mm | C: 100 mm | G: 25 mm | Mass: 1.9 kg
KR3320D-0175 KR33 No Cover In-line, Short Block×2, Stroke 175mm THK Model: KR33, Short Block ×2 (D-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 175 mm | Outer Rail Length: 300 mm | Overall Length L1: 370 mm | C: 200 mm | G: 50 mm | Mass: 3.0 kg
KR3320D-0275 KR33 No Cover In-line, Short Block×2, Stroke 275mm THK Model: KR33, Short Block ×2 (D-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 275 mm | Outer Rail Length: 400 mm | Overall Length L1: 470 mm | C: 300 mm | G: 50 mm | Mass: 3.7 kg
KR3320D-0375 KR33 No Cover In-line, Short Block×2, Stroke 375mm THK Model: KR33, Short Block ×2 (D-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 375 mm | Outer Rail Length: 500 mm | Overall Length L1: 570 mm | C: 400 mm | G: 50 mm | Mass: 4.4 kg
KR3320D-0475 KR33 No Cover In-line, Short Block×2, Stroke 475mm THK Model: KR33, Short Block ×2 (D-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 475 mm | Outer Rail Length: 600 mm | Overall Length L1: 670 mm | C: 500 mm | G: 50 mm | Mass: 5.2 kg
KR3320D-0575 KR33 No Cover In-line, Short Block×2, Stroke 575mm THK Model: KR33, Short Block ×2 (D-type) | Cover: No Cover | Motor Mounting: In-line (Series) | Cover Code: 20 (estimated ⚠️) | Stroke: 575 mm | Outer Rail Length: 700 mm | Overall Length L1: 770 mm | C: 600 mm | G: 50 mm | Mass: 5.9 kg
KR3321C-0075 KR33 With Cover In-line, Short Block×1, Stroke 75mm THK Model: KR33, Short Block ×1 (C-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 75 mm | Outer Rail Length: 150 mm | Overall Length L1: 220 mm | C: 100 mm | G: 25 mm | Mass: 1.9 kg
KR3321C-0125 KR33 With Cover In-line, Short Block×1, Stroke 125mm THK Model: KR33, Short Block ×1 (C-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 125 mm | Outer Rail Length: 200 mm | Overall Length L1: 270 mm | C: 100 mm | G: 50 mm | Mass: 2.3 kg
KR3321C-0225 KR33 With Cover In-line, Short Block×1, Stroke 225mm THK Model: KR33, Short Block ×1 (C-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 225 mm | Outer Rail Length: 300 mm | Overall Length L1: 370 mm | C: 200 mm | G: 50 mm | Mass: 3.0 kg
KR3321C-0325 KR33 With Cover In-line, Short Block×1, Stroke 325mm THK Model: KR33, Short Block ×1 (C-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 325 mm | Outer Rail Length: 400 mm | Overall Length L1: 470 mm | C: 300 mm | G: 50 mm | Mass: 3.8 kg
KR3321C-0425 KR33 With Cover In-line, Short Block×1, Stroke 425mm THK Model: KR33, Short Block ×1 (C-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 425 mm | Outer Rail Length: 500 mm | Overall Length L1: 570 mm | C: 400 mm | G: 50 mm | Mass: 4.6 kg
KR3321C-0525 KR33 With Cover In-line, Short Block×1, Stroke 525mm THK Model: KR33, Short Block ×1 (C-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 525 mm | Outer Rail Length: 600 mm | Overall Length L1: 670 mm | C: 500 mm | G: 50 mm | Mass: 5.3 kg
KR3321C-0625 KR33 With Cover In-line, Short Block×1, Stroke 625mm THK Model: KR33, Short Block ×1 (C-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 625 mm | Outer Rail Length: 700 mm | Overall Length L1: 770 mm | C: 600 mm | G: 50 mm | Mass: 6.1 kg
KR3321D-0025 KR33 With Cover In-line, Short Block×2, Stroke 25mm THK Model: KR33, Short Block ×2 (D-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 25 mm | Outer Rail Length: 150 mm | Overall Length L1: 220 mm | C: 100 mm | G: 25 mm | Mass: 2.2 kg
KR3321D-0075 KR33 With Cover In-line, Short Block×2, Stroke 75mm THK Model: KR33, Short Block ×2 (D-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 75 mm | Outer Rail Length: 150 mm | Overall Length L1: 220 mm | C: 100 mm | G: 25 mm | Mass: 2.2 kg
KR3321D-0175 KR33 With Cover In-line, Short Block×2, Stroke 175mm THK Model: KR33, Short Block ×2 (D-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 175 mm | Outer Rail Length: 300 mm | Overall Length L1: 370 mm | C: 200 mm | G: 50 mm | Mass: 3.3 kg
KR3321D-0275 KR33 With Cover In-line, Short Block×2, Stroke 275mm THK Model: KR33, Short Block ×2 (D-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 275 mm | Outer Rail Length: 400 mm | Overall Length L1: 470 mm | C: 300 mm | G: 50 mm | Mass: 4.1 kg
KR3321D-0375 KR33 With Cover In-line, Short Block×2, Stroke 375mm THK Model: KR33, Short Block ×2 (D-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 375 mm | Outer Rail Length: 500 mm | Overall Length L1: 570 mm | C: 400 mm | G: 50 mm | Mass: 4.9 kg
KR3321D-0475 KR33 With Cover In-line, Short Block×2, Stroke 475mm THK Model: KR33, Short Block ×2 (D-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 475 mm | Outer Rail Length: 600 mm | Overall Length L1: 670 mm | C: 500 mm | G: 50 mm | Mass: 5.6 kg
KR3321D-0575 KR33 With Cover In-line, Short Block×2, Stroke 575mm THK Model: KR33, Short Block ×2 (D-type) | Cover: With Cover | Motor Mounting: In-line (Series) | Cover Code: 21 (estimated ⚠️) | Stroke: 575 mm | Outer Rail Length: 700 mm | Overall Length L1: 770 mm | C: 600 mm | G: 50 mm | Mass: 6.4 kg

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