Bowie’s Dura-Seal™ and Ultra-Seal™ pumps are designed with larger diameter shafts than the industry standard, 1 ⅛”. This engineering advantage allows Bowie pumps to handle higher stress loads.
In order to provide a simple solution for customers who want to upgrade to a Bowie pump with its larger diameter shafts – without changing their existing mounting configuration – Bowie offers our Shaft Extension Kit.

- Converts Bowie’s 1 ¼” diameter shaft to 1 ⅛” diameter for ease of installation.
- Manufactured from fatigue-proof steel for long lasting performance and reliability.
- Kits currently available for the Dura-Seal™ 3700 and the Ultra-Seal™ 3600 pumps.
- Allows you to replace your current pump with a Bowie, without altering your mounting configuration.
- Conversion kit results in no reduction of the Bowie pump’s performance.
The kit comes complete with the shaft extension and a Grade 5 hex bolt, washers and a locking nut.
Specifications
Item Name: Shaft Extension Kit, Converts 1 1/4″ Diameter Shaft to 1 1/8″ Diameter Shaft.
Bowie Item Number: SH-EXT11/4.
Material: Fatigue proof steel to ASTM A311 Standard
1 1/4″ Female Coupler End: 1.25” Inner Diameter by 3.125” Inner Length2.25” Outer Diameter
1 1/8″ Shaft End: 1.125” Outer Diameter by 3.0” Length
Total Overall Length: 7.0”
Key: ¼” X ¼” by 1 ¼” Length
Ship Weight (lbs): 4.05
Includes: SAE Grade 5 Hex Bolt (⅜” x 2 ¾”) with 2 washers and a locking nut
