KHK SW0.5-R2 black oxide carbon steel double-start right-hand worm gear, module 0.5 with 5 mm boreKHK SW0.5-R2 black oxide carbon steel double-start right-hand worm gear, module 0.5 with 5 mm bore
KHK SW0.5-R2 black oxide carbon steel double-start right-hand worm gear, module 0.5 with 5 mm bore

KHK

KHK SW0.5-R2, Module 0.5, Double Lead, Right Hand, Carbon Steel Worms

$16.50
Shipping calculated at checkout.

KHK SW0.5-R2 is a compact, double-start right-hand steel worm for small worm-drive extruder and motion projects that specify the KHK SW series. Module 0.5, 2 starts, 5 mm bore, and 18 mm overall length make it a very small precision drive part—not a generic hobbed pulley or printed substitute.

Why this part

  • Exact KHK catalog part: SW0.5-R2, the right-hand, double-start version of KHK’s SW carbon-steel worm series.
  • Fine module drive: module 0.5 with a nominal lead angle of 5°13′ for compact worm gear reductions.
  • Machined steel body: S45C / AISI 1045 carbon steel with black oxide coating except on ground areas.
  • Serviceable mounting: 5 mm bore with an M3 set-screw hole.

Specifications

  • Manufacturer / MPN: KHK SW0.5-R2
  • Gear type: worm gear / worm
  • Module: 0.5
  • Starts: 2 / double lead
  • Hand of thread: right hand
  • Material: S45C carbon steel (AISI 1045 equivalent)
  • Precision grade: KHK W 001 grade 4
  • Pressure angle: 20°, normal plane, standard full-depth teeth
  • Bore: 5 mm; pitch diameter: 11 mm; outside diameter: 12 mm
  • Face width: 10 mm; total length: 18 mm; set screw: M3
  • Approx. weight: 0.01 kg

Fitment and pairing

Use this where your BOM or project notes call out KHK SW0.5-R2 specifically. Community listings call out Kyro-style extruder use and Annex DFA fitment, but worm gears are geometry-sensitive—match module, starts, hand, bore, and the mating worm wheel before ordering.

Looking at the adjacent KHK family? The live store also has the KHK DG0.5-40R1 module 0.5 acetal worm wheel; treat it as a related KHK module 0.5 part, not an automatic mate for this R2 worm.

What it is not

  • Not a complete extruder kit.
  • Not a generic brass worm or printed gear.
  • Not interchangeable with single-start R1 worms unless your design explicitly allows it.
Shipping & Returns

Returns:

Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.

Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.

Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.

Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.

To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.

Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.

Order alterations and cancellations:

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Shipping:

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International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs. 

I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost. 

If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement. 

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