Hammer SM40

PART ID: 21000 Hammer SM40

PART ID: 21001 Hammer SM40 with Grapple (shown)

Drives fence posts, sign posts, guard rails, median dividers, tent stakes, T-posts, pipe fence, and railroad ties with ease. Model SM40 has a 40” drop hammer design. With this innovative design, you can achieve a full stroke with every cycle or utilize the short stroke feature to fine tune your depth. The Hammer DOES NOT operate with springs, hydraulic cylinder, or return line. Grapple option can be added to any model for a true one-person operation (does not include t-posts). The grapple option will allow the operator to grab the post off the ground, load it into the machine, and drive it in the ground without leaving the skid-steer seat. Tilt option allows up to 20˚ in each direction. The hammer weight is 300 lbs. from the factory. Additional weight can be added for a total of 500 lbs. 

NOTE:  If post/pipe diameter is 5" or smaller and you have a helper, PN 21395 Donut Strike Plate must be purchased separately. If driving with one person, PN 21212 Horseshoe Strike Plate is a better option. See Accessories tab below.

CB40 Breaker Kit is available to convert any Hammer post driver into a concrete breaker.


how to buy Watch Videos
Mounting Options
  P65 Warning WARNING
This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/product.
  Model SM40 Model SM40 w/ Grapple
Overall Length 45.5"
Overall Width 25"
Overall Height 64"
Tilt (side-side) N/A
Machine Weight 915 lbs (1,115 lbs w/ additional weight) 955 lbs (1,155 lbs w/ additional weight)
Hammer Weight 300 LBS (500 LBS MAX)
Length of Stroke 40"
Max. Strokes per Minute 35
Hydraulic Requirements 1500-3000 PSI
*12-30 GPM
Maximum Post Width 8.5" x 9.25"
Impact Force 82,000 lbs @ 500 lb weight
Impact Energy 1,025 ft-lbs @300 lb weight;
1,709 ft-lbs @ 500 lb weight

*Hammer will still operate on machines with less than 12 GPM
with fewer strokes per minute.

Post Dimensions:T-post to RR Tie
Impact Force:82,000 lbs.
Length of Stroke:40
Hammer Weight:300
Strokes per Minute:35
3501 Backhoe & Excavator Mount Specification Form
21163 Hammer Additional Weight Kit
21149 Hammer T-Post Adapter
21212 Plate- Floating Horseshoe
21280 Plate- Guard Rail
21395 Plate- 5" Donut
21004 Hammer SM40 Grapple
21005 Hammer SM40 Tilt
21278 CB40 Breaker Kit