SDP/SI Logo SHOP ONLINE (800) 819-8900

    Contact Us

If you want to talk about your project, call us. We'd really love to help!


Ask an Engineer Ask an engineer

Use our Ask an Engineer Form for technical questions regarding our custom products, secondary operations, stock products, your application, or the integration of both. Our team of Application Engineers are here to assist you with any inquiries you may have.

Customer Support General inquires and customer support

If you have questions about billing, a shipping,or any other general question use our Contact Us Form.

Technical Support Technical support

Use our Technical Support Form for questions regarding your online account (i.e, changing your password) or if you're experiencing problems with our website.
Submit an RFQ Submit an RFQ



An RFQ for a Stock or Custom product.

You can request a quote on any of our products. Please provide us with the part numbers you would like to get a quote on and how many you would like.



An RFQ for precision tooth cutting.

Send Us Your Blanks! Precision Tooth Cutting – 3/16” to 4” OD. We provide fast turnaround on cutting and deburring, fine pitch to medium pitch: gears, pulleys, worm gears, bevel gears, helical gears, while meeting your exact specifications.


Phone: 1-800-819-8900
Address: 250 Duffy Ave., Hicksville, NY 11801
Email: sdp-sisupport@sdp-si.com



Hours of operation: Monday - Friday / 9am EST. - 5pm EST.

Holidays (Closed):   Christmas Eve thru New Year's Day
President's Day
Memorial Day
Independence Day
Labor Day
Thanksgiving Day & Day After

We're Hiring Be part of the team
We're looking for talented people to join our team. Visit Our Careers Page to find out what positions are available.


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