Introducing the HT618 Hydraulic Weld-On Thumb, built-tough for contractors, homeowners, and landscapers who demand reliability and durability. Our 6"x18" thumb is designed for machines under 3,900lbs and weighs just 38lbs. Constructed from 1/2" thick AR400 steel tines in a ladder frame construction with gussets, it's designed for increased strength and long-lasting durability. Trust in the HT618's double-sealed welded cylinder, ensuring increased reliability for years to come. Both the cylinder pins and main pin are greaseable, ensuring smooth operation and reduced wear.
Experience the superior geometry of the HT618 Hydraulic Weld-On Thumb. With a maximum extension angle of 140 degrees, it outperforms the competition, offering greater versatility and ease of use. When fully retracted, the tines only extend 7.5" away from the edge of the excavator stick, ensuring minimal stowed dimensions and preventing interference when digging. The thumb's geometry is designed to mechanically stop the tine assembly from causing cylinder lock-out when retracted, protecting your equipment and guaranteeing a smooth operation.
Maximize Your Investment
Invest in the HT618 to maximize the capabilities of your excavator and get the job done faster and more efficiently. With 35 years of experience and a strong commitment to our company values, Gentec has become a trusted choice for more than 50,000 satisfied clients. As a family-owned business, we take pride in our products and prioritize your satisfaction. Choose the HT618 Hydraulic Weld-On Thumb for a lasting investment that will make a difference in your projects for years to come.
6" wide, 18" long
Ideal for machines smaller than 3,900lbs
1/2" thick AR400 steel tines assembled in a ladder frame layout and with gussets
Double-sealed welded cylinder for increased reliability
Thumb geometry designed to mechanically prevent cylinder lock-out when retracted
Maximum extension angle of 140 degrees
Minimal stowed dimensions with tines extending only 7.5" from excavator stick when fully retracted
Greaseable cylinder pins and main pin
23 3/8" backplate
Hydraulic cylinder included
Replacement parts readily available
1 Year Warranty
** PLEASE CHECK YOUR MEASUREMENTS BEFORE ORDERING. (LOOK UNDER "BIG DAVE" TAB FOR INSTRUCTIONS) CALL WITH ANY QUESTIONS OR IF YOU NEED HELP THE THUMBS CAN BE TRICKY TO ORDER CORRECT.
⚠ Pro Tip!If your excavator is equipped with a Pin-Grabber quick coupler, choose a longer thumb to ensure a suitable fit with your bucket.
Max. Extension Angle
Max. Operating Weight
Min. Operating Weight
Main Pin Diameter
Excavator Weight Class
1,500lbs to 3,900lbs
9NX-2, 7J, 7GX
17G, 17D, 17C
Thumbs usually ship out within (3) days
Please follow these instructions when measuring. You want your "stick to tip" measurement to be as close to the thumb tine length as possible. GENTEC's mounting plates are very narrow so typically there is no problems with the mounting plate (exception is the very smallest class of mini excavator)
Please follow these instructions when installing your thumb.
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