Once you select add to cart. A form will pop up with additional information such as a bucket system and an area to add notes. This information does not change the price of the kit.
Kubota U27 Hydraulic Excavator Thumb Attachment Kit
Runser Custom Machining
Compatible models
Kubota U27
Fits Kubota OEM and TAG bucket system.
Optional Cylinder base mount (Welding Required)
See our common questions page if you are unsure of what your machine requires.
RCM policies
Made in the USA
1 year warranty
30 - Day returns
UPS Ground shipping 3 - 5 business days
Free shipping to the lower 48 states
Ships to the USA and Canada contact us with your address for an accurate quote.
Shipping to Canada, Alaska, and Hawaii, approximately additional ($300 - $450)
Kit Includes
RCM custom designed thumb
Custom hydraulic cylinder
Two ½’’ hydraulic hoses - 24” long
Main pin 4140 Heat Treated (not center drilled)
Two hydraulic cylinder pins
Two 90- degree elbows
Four nuts and bolts
Optional cylinder base mount available (welding required).
Thumb Technical Specifications
Material: Composed of two 3⁄4'' thick AR400 steel tines.
AR400 is a much stronger and harder steel than A36 steel. Many fabricators only use A36 Steel, causing them to wear down quickly.
Custom designed and manufactured in the USA.
Length = 27’’
Width = 9.25’’ between thumb bushings (at main pin attachment point)
To verify this measurement on your machine, an example photo is located in the product photos above (see our FAQ page.)
Designed for maximum possible stroke, the thumb folds up and out of the way when not in use, under 12’’. Less than even factory designed models.
Interference on a 12’’ bucket, thumb will close down to within 2 or 3 inches of bucket teeth.
Hydraulic Cylinder Specifications
Cylinder stroke distance = 19’’
High quality with a stronger internal rod to prevent bending.
Made for 3500 psi, tested at 3000 psi.
Utilizing side ports allows for the hoses to connect out of the way of use.
Custom designed and manufactured in the USA.
Pin Technical Specifications
The main pin is from 4140 Heat treated, high strength steel.
This high strength pin will last, decreasing chances of: complications, breaks, wear, and tear. Not center drilled.
Due to increased chances of the main pin breaking, we do not center drill the main pins for grease fittings.
Grease Fittings
Grease fittings are provided at all pivoting locations. Fittings are protected from material collision that may occur during use.
We recommend adding a grease point on the stick of your machine. See our FAQ page for more information
Key features
Heavy duty, superior quality, incredible design, and durability.
Easy Installation
Easy customizations to fit your excavator thumb kits needs
Complete thumb kit with everything you need, to install on your excavator.
We are continually striving to produce the best quality thumbs possible.
These excavator thumb kits are made to last!
RCM is a family owned and run business; we have been producing thumbs in the USA for over 15 years. Due to our designs, fabrication quality, and customer service, we have many happy customers. Check out our reviews.
If you are interested in a thumb for a different machine or have any other questions; contact us.
Runser Custom Machining
Once you select add to cart. A form will pop up with additional information such as a bucket system and an area to add notes. This information does not change the price of the kit.
Kubota U27 Hydraulic Excavator Thumb Attachment Kit
Runser Custom Machining
Compatible models
Kubota U27
Fits Kubota OEM and TAG bucket system.
Optional Cylinder base mount (Welding Required)
See our common questions page if you are unsure of what your machine requires.
RCM policies
Made in the USA
1 year warranty
30 - Day returns
UPS Ground shipping 3 - 5 business days
Free shipping to the lower 48 states
Ships to the USA and Canada contact us with your address for an accurate quote.
Shipping to Canada, Alaska, and Hawaii, approximately additional ($300 - $450)
Kit Includes
RCM custom designed thumb
Custom hydraulic cylinder
Two ½’’ hydraulic hoses - 24” long
Main pin 4140 Heat Treated (not center drilled)
Two hydraulic cylinder pins
Two 90- degree elbows
Four nuts and bolts
Optional cylinder base mount available (welding required).
Thumb Technical Specifications
Material: Composed of two 3⁄4'' thick AR400 steel tines.
AR400 is a much stronger and harder steel than A36 steel. Many fabricators only use A36 Steel, causing them to wear down quickly.
Custom designed and manufactured in the USA.
Length = 27’’
Width = 9.25’’ between thumb bushings (at main pin attachment point)
To verify this measurement on your machine, an example photo is located in the product photos above (see our FAQ page.)
Designed for maximum possible stroke, the thumb folds up and out of the way when not in use, under 12’’. Less than even factory designed models.
Interference on a 12’’ bucket, thumb will close down to within 2 or 3 inches of bucket teeth.
Hydraulic Cylinder Specifications
Cylinder stroke distance = 19’’
High quality with a stronger internal rod to prevent bending.
Made for 3500 psi, tested at 3000 psi.
Utilizing side ports allows for the hoses to connect out of the way of use.
Custom designed and manufactured in the USA.
Pin Technical Specifications
The main pin is from 4140 Heat treated, high strength steel.
This high strength pin will last, decreasing chances of: complications, breaks, wear, and tear. Not center drilled.
Due to increased chances of the main pin breaking, we do not center drill the main pins for grease fittings.
Grease Fittings
Grease fittings are provided at all pivoting locations. Fittings are protected from material collision that may occur during use.
We recommend adding a grease point on the stick of your machine. See our FAQ page for more information
Key features
Heavy duty, superior quality, incredible design, and durability.
Easy Installation
Easy customizations to fit your excavator thumb kits needs
Complete thumb kit with everything you need, to install on your excavator.
We are continually striving to produce the best quality thumbs possible.
These excavator thumb kits are made to last!
RCM is a family owned and run business; we have been producing thumbs in the USA for over 15 years. Due to our designs, fabrication quality, and customer service, we have many happy customers. Check out our reviews.
If you are interested in a thumb for a different machine or have any other questions; contact us.
Runser Custom Machining
