EAST ATTACHMENTS
2026 WinnerSteel ProductsCALL NOW336-829-5016Excavator attachment fitment
Illustrated measurement guidelines for excavator attachments, pin-on thumbs, weld-on thumbs and trapezoid buckets manufactured by East Attachments.
01 / WHY MEASUREMENTS MATTER
Machine make and model are the starting point—not the final fitment. Pin geometry, stick width, coupler construction and previous machine modifications can change the dimensions an attachment must match.
Use the guide that corresponds to the product you are requesting. East Attachments will review the submitted information before fabrication, and the estimated lead-time period begins after all required measurements are confirmed.
02 / BEFORE YOU MEASURE
Small setup errors can create large fitment differences. Work safely, keep the machine stationary and never place yourself beneath unsupported equipment.
Record the machine make, model, operating weight and the quick-coupler type when applicable.
Remove dirt and excess grease from pin bores, collars, bushings and ear faces before measuring.
Use calipers for diameters and small fitment details. Use a reliable tape for larger center-to-center distances.
Enter excavator pin and fitment measurements in millimeters unless East Attachments requests otherwise.
Photograph each measured area straight-on and include a wider view showing the linkage or coupler.
Do not assume fabrication has begun until East Attachments confirms the required measurements.
03 / Approved visual guides
Open any guide at full size while measuring. Do not estimate hidden dimensions or substitute measurements from a different machine without confirming them with East Attachments.
Use this guide for standard pin-on excavator attachments. Keep the pin holes visible and measure from the actual machined surfaces.
A pin-on thumb requires detailed bucket, stick, collar and pin information so the thumb and required extra-long pin can be built around the machine.
Use this guide for weld-on manual and weld-on hydraulic thumbs. Position the bucket teeth at 90 degrees from the stick before taking Dimension 1.
Record the finished trench profile and discuss any special slope requirement with East Attachments before placing the order.
04 / PRODUCT-SPECIFIC NOTES
The exact information requested depends on the attachment, mounting method and whether the excavator is using a quick coupler.
Confirm inside ear width, main pin diameter, power link pin diameter and the center distance between both pins.
Complete the detailed pin-on thumb guide. The required extra-long pin is included with the pin-on thumb.
Manual and hydraulic tilt couplers include one set of pins. Provide the machine and product-specific dimensions requested during configuration.
Discuss a required slope with an East Attachments representative before ordering. Overall depth is based on excavator weight class.
Measurement FAQs
Still uncertain about a measurement? Stop and call the shop. A confirmed dimension is more valuable than a quick estimate.
Excavator makes and models can use different pin diameters, ear widths, pin centers and coupler arrangements. Confirming the requested dimensions helps East Attachments fabricate the attachment around the actual machine instead of relying only on a model lookup.
List every pin diameter and excavator fitment dimension in millimeters unless an East Attachments representative specifically requests another unit. Record the actual measured value rather than rounding to a nominal size.
Use a clean tape measure for larger distances and calipers for pin diameters, collar widths and cross holes. Remove dirt and heavy grease from the contact points before measuring, and take clear reference photos from straight-on angles.
The machine make and model should always be provided, but physical measurements are still required for many attachments. If the machine uses a quick coupler, identify the coupler and follow the product-specific fitment instructions supplied by East Attachments.
The estimated lead-time period begins after East Attachments has reviewed and confirmed all required measurements. Missing, unclear or conflicting dimensions must be resolved before fabrication can be scheduled.
Pins are sold separately for most excavator attachments. Manual quick couplers and hydraulic tilt couplers include one set of pins, and a pin-on thumb includes the required extra-long pin.
Discuss any specific slope requirement with an East Attachments representative before placing the order. Bottom width, top width and height establish the requested profile, while overall depth is based on the excavator weight class.
NEED HELP CONFIRMING A DIMENSION?